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  • Effects of Nozzle Geometry on Turbulent Characteristics ...

    The effects of nozzle exit geometry on the characteristics of a surface attaching jet were investigated experimentally. Three different types of nozzle geometries were studied, including a circular, square and rectangular nozzle with the same exit area. The jets were discharged with an offset height of two nozzle width at a Reynolds number of 5500. A particle image velocimetry system was used ...

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  • NUMERICAL SIMULATIONS OF MICRO JETS PRODUCED WITH A DOUBLE ...

    Key words: Multiphase Flow, Micro Jet, Double Flow Focusing Nozzle Abstract. Stable and reliable micro jets are important for many applications. Double flow focused micro jets are a novelty with an important advantage of significantly reduced sample consumption. Numerical simulations of double flow focused micro jets are a highly complex task.

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  • Development of a deflector-jet electrohydraulic servovalve ...

    devices. The first stage of such valves has assumed a variety of forms, including a sliding spool, a flapper-nozzle, a jet-pipe, and a deflector-jet, whose performance characteristics are shown in table 1. A double-nozzle flapper is a full bridge with two variable arms, and the use of two nozzles makes the design relatively

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  • Effect of Thiourea on the Properties of a Cu–Al2O3 Coating ...

    Keywords: jet electrodeposition, thiourea, coatings, mechanical properties 1. Introduction Nanocomposite electrodeposition is a suitable technique for co-depositing a variety of nanoparticles (NPs) to improve the properties of coatings1,2) and has gained widespread use for the protection of automotive engineering and the casting

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  • Optimization of fluid characteristics in the main nozzle ...

    2021-8-18 · In this research, the jet-flow characteristics under tank pressures of 2 ∼ 6 kgf/cm2 were studied to obtain basic data for an optimal design of the main nozzle in an air- jet loom.

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  • Numerical simulation for optimizing the nozzle of moist ...

    The nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles were simulated and analyzed by adopting orthogonal test method with Fluent simulation software combined.

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  • Momentum and Vorticity Balances in a Jet that Issues from ...

    effect of a wide variety of initial-boundary conditions, which affect the development and the characteristics of the mean and turbulent properties of the jet. Based on previous experimental work that demonstrated that axial mean velocity profiles featured a saddle-backed shape for aspect ratios AR 5, Tsuchiya et al. (1986) presented profiles

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  • LABORATORY MANUAL Fluid Mechanics & Hydraulic Machines II ...

    the vane deflects the jet and due to the change in the momentum of the water jet, a force is imparted to the vane by water. Experimental setup: The equipment consists of a high efficiency gun metal nozzle fitted to a 25mm.dia. Pipe supply line with a gate valve. Vertically above the nozzle, a gun metal vane is fitted to a

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  • Primary Breakup of Turbulent Round Liquid Jets in Uniform ...

    However, effects of liquid turbulence on the deformation and breakup properties of round liquid jets in crossflow were not investigated in these studies; this is unfortunate, because most practical liquid injectors introduce some degree of turbulence in the liquid jet leaving the injector passage.

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  • Internal Structure of a Jet Nozzle for Coalbed Methane ...

    Based on airfoil curves that can effectively balance the rectification and drag reduction effects in flight hydrodynamics, we designed an internal streamline structure of jet nozzle for coalbed methane (CBM) mining. The three types of nozzles originating from three typical airfoil curves are compared with the conical nozzle. Results showed that the thin-type streamlined nozzle had the largest ...

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  • A Correlation of Mixing Noise From Coannular Jets With ...

    nozzle, was used for calibration throughout the test series. The primary duct fairing (illustrated in fig. 1) within the nozzle did not have any adverse effect on the performance of the convergent nozzle. Models 2 and 3 are coan- . nular nozzles with area ratios 0.75 and 1.20, respectively. The secondary or

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  • Prediction of the diameter of jet grouting columns with ...

    The parameter α quantifies the effects of the shrouding air jet in double and triple fluid systems (it is equal to 1 for single fluid system, to 6 for double and triple fluid), the parameters β and δ are found by calibration with the data obtained from literature and from the personal experience of the authors (β=0.2 and δ=−0.25).

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  • Numerical simulations on jet impingement cooling of ...

    constant fluid properties. The cylindrical surface is considered to have a constant heat flux, q. The jet issuing from the nozzle is confined (in a circular domain). The distance between the exit of nozzle and the heater cylinder is z. The cylinder axis is aligned with the z axis and nozzle axis is aligned with the x axis.

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  • Investigation of nanoparticle effects on jet impingement ...

    Zeitoun et al. examined the effect of different Reynolds numbers, particle concentrations, nozzle diameters and circular plate diameters on the heat transfer performance of an Al 2 O 3-water nanofluid jet impinging on a circular surface. They found that at the same Reynolds number, increasing the volume fraction resulted in the heat transfer ...

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  • Momentum and Vorticity Balances in a Jet that Issues from ...

    effect of a wide variety of initial-boundary conditions, which affect the development and the characteristics of the mean and turbulent properties of the jet. Based on previous experimental work that demonstrated that axial mean velocity profiles featured a saddle-backed shape for aspect ratios AR 5, Tsuchiya et al. (1986) presented profiles

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  • Energy distribution modulation by mechanical design for ...

    Electrolyte jet processing (EJP) is the amalgamation of electrochemical jet machining (EJM) , , and electrochemical jet deposition (EJD) , , within a unified machine tool.This technique can achieve jetted deposition of material with a cathodic workpiece, and jetted material removal with an anodic workpiece (Fig. 1a).Manipulation of process parameters, polarity and electrolyte chemistry enables ...

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  • Theory of Aerospace Propulsion

    Although the fundamental analysis of nozzles applies to both air-breathing and rocket engines, this study emphasizes nozzles for jet aircrafts. It further discuses the frictional effect, the drag effect, and the energy transfer effects on the nozzle. Another part of the chapter explains the effect of sample area change in the nozzle design.

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  • Internal Structure of a Jet Nozzle for Coalbed Methane ...

    Based on airfoil curves that can effectively balance the rectification and drag reduction effects in flight hydrodynamics, we designed an internal streamline structure of jet nozzle for coalbed methane (CBM) mining. The three types of nozzles originating from three typical airfoil curves are compared with the conical nozzle. Results showed that the thin-type streamlined nozzle had the largest ...

    Get Price
  • Flow and acoustic characteristics of non-axisymmetric jets ...

    Flow and acoustic behavior of two asymmetric, rectangular (AR = 4) and elliptic (AR = 2.5), jets are studied and compared to an equivalent area round jet. The jets are operated at a Mach number of 0.9 and temperature ratio of 1. Time-averaged flow field measurements are carried out using planar and stereoscopic particle image velocimetry. In addition, far-field microphone measurements are ...

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  • A Review of the Effect of Processing Variables on the ...

    Meechaisue and coworkers [] examined the effect of different concentrations of poly(DTE carbonate) on electrospun nanofiber formation.At a concentration of 5% W/V (2.5 cp), mainly droplets were formed since the viscoelastic forces at this concentration were not sufficient to overcome the repulsive forces of charge, resulting in the fiber jet fragmenting into droplets.

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  • Momentum and Vorticity Balances in a Jet that Issues from ...

    effect of a wide variety of initial-boundary conditions, which affect the development and the characteristics of the mean and turbulent properties of the jet. Based on previous experimental work that demonstrated that axial mean velocity profiles featured a saddle-backed shape for aspect ratios AR 5, Tsuchiya et al. (1986) presented profiles

    Get Price
  • General Disclaimer One or more of the Following Statements ...

    Recirculating jet or nozzle systems require more complex hardware than (to oil-gas mist systems. Recirculating jet lubrication is most commonly used on airbreath-ing turbojet engines today. There have been many studies conducted to determine optimum lubricant jet arrangements. Typical of these is 141 in which the efficiency of single, multiple and

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  • A FORMULATION STUDY OF LONG FIBER THERMOPLASTIC ...

    Nozzle 250⁰C Mold 50⁰C Shot Size, inch 2.25 Boost Pressure , psi 1000 Injection Speed in/s 1.5 Hold Pressure, psi 925 Screw Speed 90 Back Pressure, psi 50 Unless otherwise stated, all mechanical property testing was performed at 23⁰C and at a relative humidity of 50%. All testing was done in the PPG Fiber Glass Science and Technology

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  • Development of a deflector-jet electrohydraulic servovalve ...

    The present designs of pilot-operated servovalves are either of a flapper-nozzle type or of a jet-pipe type, and the design aspects and various configurations of servovalves, particularly flapper-nozzle types, are available in many textbooks (Merrit 1967, Watton 1989, McCloy and Martin 1980). However, studies investigating deflector-jet type ...

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  • Numerical Study of the Micro-Jet Formation in Double Flow ...

    The purpose of this work is to determine, based on the computational model, whether a mixture of a binary liquid is capable of producing longer, thinner and faster gas-focused micro-jets, compared to the mono-constituent liquids of its components. Mixtures of water with two different alcohols, water + ethanol and water + 2-propanol, are considered. The numerical study of pre-mixed liquids is ...

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  • ELASTIC PROPERTIES OF JET-GROUTED GROUND AND APPLICATIONS

    Jet-grouting is one possible ground improvement technique. The behavior of the soil improved by jet-grouting is still not well understood. In this thesis, the mechanical behavior of the injected soil is modeled in order to determine the different parameters needed for the engineering design of a soil reinforcement based on jet-grouting.

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  • B. G. Thomas*, R. Singh, S. P. Vanka, K. Timmel, S. Eckert ...

    if the jet first impinges on the narrow face, and splits, flowing upward toward the free surface, and downward, generating a stable “double-roll” flow pattern [1, 2]. The flow pattern depends on the nozzle geometry, casting speed, mold width, mold thickness, argon gas injection, submergence depth, and the application of electromagnetic ...

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  • A Review of the Effect of Processing Variables on the ...

    Meechaisue and coworkers [] examined the effect of different concentrations of poly(DTE carbonate) on electrospun nanofiber formation.At a concentration of 5% W/V (2.5 cp), mainly droplets were formed since the viscoelastic forces at this concentration were not sufficient to overcome the repulsive forces of charge, resulting in the fiber jet fragmenting into droplets.

    Get Price
  • Study on Pressure Coefficient in Process of Double Slot ...

    1 School of Automation, Northwestern Polytechnical University, Xi’an, 710072, China 2 School of Information and Electrical Engineering, Hebei University of Engineering, Handan 056038, China . Received: 20 May 2018 Abstract. Air cushion furnace is widely used in the heat treatment process of aluminum strip, copper strip and silicon steel, and the double slot nozzle is the core part of the air ...

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  • Green Mechanic: Deflection of Beam Lab Report

    Elastic modulus is the mechanical property of material which is the ratio of tensile stress and strain. Greater …

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  • Momentum and Vorticity Balances in a Jet that Issues from ...

    effect of a wide variety of initial-boundary conditions, which affect the development and the characteristics of the mean and turbulent properties of the jet. Based on previous experimental work that demonstrated that axial mean velocity profiles featured a saddle-backed shape for aspect ratios AR 5, Tsuchiya et al. (1986) presented profiles

    Get Price
  • Numerical simulation for optimizing the nozzle of moist ...

    The nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles …

    Get Price
  • Nondimensional Parameter for Characterization of Wall ...

    (ii) Nozzle shape and the nozzle aspect ratio affect flow conditions at the nozzle exit and, thus, will have an impact on the wall shear stress. A nozzle correction factor could be developed in future work to account for over-expanded nozzles. (iii) Jet angle will also have a significant impact on the wall shear stress.

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  • 7. COOLING TOWER

    (double-flow tower). An induced draft fan draws the air across the wetted fill and expels it through the top of the structure. The Figure 7.2 illustrates various cooling tower types. Mechanical draft towers are avail-able in a large range of capacities. Normal capacities range from approximately 10 tons,

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  • (PDF) 3ME1: MECHANICS OF SOLIDS-I

    UNIT 5 Properties of Steam: Phase change process, use of steam table and mollier chart. Vapour power cycle: Rankine cycle, effect of operating conditions on its efficiency, reheat cycle, regenerative cycle, bleeding extraction cycle, feed water heating properties of ideal working fluid in vapour power cycle co-generation cycle.

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  • Theoretical model and characteristics analysis of ...

    To analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet…

    Get Price
  • LABORATORY MANUAL Fluid Mechanics & Hydraulic Machines II ...

    the vane deflects the jet and due to the change in the momentum of the water jet, a force is imparted to the vane by water. Experimental setup: The equipment consists of a high efficiency gun metal nozzle fitted to a 25mm.dia. Pipe supply line with a gate valve. Vertically above the nozzle, a gun metal vane is fitted to a

    Get Price
  • A Review of the Effect of Processing Variables on the ...

    Meechaisue and coworkers [] examined the effect of different concentrations of poly(DTE carbonate) on electrospun nanofiber formation.At a concentration of 5% W/V (2.5 cp), mainly droplets were formed since the viscoelastic forces at this concentration were not sufficient to overcome the repulsive forces of charge, resulting in the fiber jet fragmenting into droplets.

    Get Price
  • PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE

    spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical …

    Get Price
  • Green Mechanic: Deflection of Beam Lab Report

    Elastic modulus is the mechanical property of material which is the ratio of tensile stress and strain. Greater …

    Get Price
  • Numerical simulation for optimizing the nozzle of moist ...

    The nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles were simulated and analyzed by adopting orthogonal test method with Fluent simulation software combined.

    Get Price
  • LABORATORY MANUAL Fluid Mechanics & Hydraulic Machines II ...

    the vane deflects the jet and due to the change in the momentum of the water jet, a force is imparted to the vane by water. Experimental setup: The equipment consists of a high efficiency gun metal nozzle fitted to a 25mm.dia. Pipe supply line with a gate valve. Vertically above the nozzle, a gun metal vane is fitted to a

    Get Price
  • Numerical simulation of workpiece thermal profile in ...

    the nozzle at the point of maximum arc constriction. The protection afforded by the water-steam boundary layer also allows a unique design innovation: the entire lower portion of the nozzle can be ceramic. Consequently, double arcing from the nozzle touching the workpiece--the major cause of nozzle destruction--is virtually eliminated.

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  • Nondimensional Parameter for Characterization of Wall ...

    (ii) Nozzle shape and the nozzle aspect ratio affect flow conditions at the nozzle exit and, thus, will have an impact on the wall shear stress. A nozzle correction factor could be developed in future work to account for over-expanded nozzles. (iii) Jet angle will also have a significant impact on the wall shear stress.

    Get Price
  • PILOT OPERATED FLOW CONTROL VALVE WITH ANALOG INTERFACE

    spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical …

    Get Price
  • 3D printing of conducting polymers

    To investigate the effect of mechanical bending on the electrical performance, we characterize the electrical conductivity of the 3D-printed conducting polymers (100-µm nozzle, 1 layer) on ...

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  • Design and Analysis of a Combustion Chamber in a Gas ...

    A combustor is a component or area of engine where combustion takes place. It is also known as a burner, combustion chamber or flame holder. In a gas turbine engine, the combustor or combustion. chamber is fed high pressure air by the compression system. The combustor then heats this air at constant pressure.

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  • Nickel-Based Superalloys for Advanced Turbine Engines ...

    The double-edge effect of second-phase particles on the recrystallization behaviour and associated mechanical properties of metallic materials Progress in Materials Science, Vol. 92 Isothermal sections of the Co–Ni–Ti system at 950 and 1 000 °C

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  • (IUCr) XFELs for structure and dynamics in biology

    The development and application of the free-electron X-ray laser (XFEL) to structure and dynamics in biology since its inception in 2009 are reviewed. The research opportunities which result from the ability to outrun most radiation-damage effects are outlined, and some grand challenges are suggested. By avoiding the need to cool samples to minimize damage, the XFEL has permitted atomic ...

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  • Modern Physics Letters B

    PDF/EPUB. Preview Abstract. In this paper, we study the effect of the axial deformation of carbon nanotubes in the zigzag and armchair directions on the stability of the interface between hydrogenated and non-hydrogenated regions. We analyze the specific energy of this interface as a function of the axial strain.

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  • Experimental Investigation on the Influence of a Double ...

    Appl. Sci. 2017, 7, 1281 2 of 14 from a long slot parallel to a wall [17]. A double-walled confined jet refers to a jet form in which two solid walls are placed in the nozzle exit space so that the jet beam cannot sufficiently diffuse [18].

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  • Nickel-Based Superalloys for Advanced Turbine Engines ...

    The double-edge effect of second-phase particles on the recrystallization behaviour and associated mechanical properties of metallic materials Progress in Materials Science, Vol. 92 Isothermal sections of the Co–Ni–Ti system at 950 and 1 000 °C

    Get Price
  • Numerical simulation for optimizing the nozzle of moist ...

    The nozzles of moist-mix shotcrete are the key parts of forming a steady jet flow field and ensuring the uniform mixing of water and other ingredients. In this paper, for optimizing the nozzle of moist-mix shotcrete, both the internal and external field of a variety of spray nozzles …

    Get Price
  • Experimental Study on the Influence of Nozzle Diameter on ...

    Waterjet abrasive nozzle is the key component for accelerating abrasive particle velocity and its diameter has important influence on water jet. The relationship between nozzle diameter and waterjet cutting performance has been studied by experiment. The results show: The incision depth and width of specimen decrease linearly with the decreasing of nozzle diameter; The linearity of jet moving ...

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  • Effect of physical parameters and temperature on the piezo ...

    Vice versa, a short tail and an optimum viscoelastic behavior of the fluid will lead to that the tail is instantly pulled into the drop after ejection and jet breakup at the nozzle 33.

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  • Theoretical model and characteristics analysis of ...

    To analyze the deflector-jet servo valve’s internal flow characteristics, a theoretical model of the complicated flow distribution in the deflector plate is established based on the offset jet attachment theory. When the deflector plate offsets, jet attachment parameters are attained to figure out the jet…

    Get Price
  • Multi‐jet nozzle electrospinning on textile substrates ...

    Increasing knowledge of multi‐jet electrospinning is crucial for developing industrial devices for large‐scale nanofibre production. This paper reports on the effect of a non‐conducting textile substrate placed between a jet‐emitting source (nine‐nozzle arrangement) and collector.

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  • Calculation of Flow through Nozzles and Orifices

    Calculations. The relationships for flow rate, pressure loss and head loss through orifices and nozzles …

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  • Basics of Space Flight: Rocket Propulsion

    Specific Impulse. The specific impulse of a rocket, I sp, is the ratio of the thrust to the flow rate of the weight …

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  • Publications

    This property may effect on some structural properties of soil such as shear strength. In present study, shear strength parameters are determined by both leachates polluted and not polluted bentonite-amended zeolite soil with mixing rates (B/Z) of 5%-10% and 20% with unconfined compression test to obtain the differences.

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  • Applsci 08 02637

    applsci-08-02637 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Scribd is the world's largest social reading and publishing site. Open navigation menu

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  • (PDF) Effect of Fuel Injection Mode on Performance and ...

    Downloaded from SAE International by Sreetam Bhaduri, Monday, June 07, 2021 2021-01-5065 Published 08 Jun 2021 Effect of Fuel Injection Mode on Performance and Emission Characteristics of a Spark-Ignition Engine—A Computational Fluid Dynamics Analysis Sreetam Bhaduri and J.M. Mallikarjuna Indian Institute of Technology Madras Citation: Bhaduri, S. and Mallikarjuna, J.M., “Effect of Fuel ...

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    pre diabetes management handout pdf ?fasting blood sugar goal. The combined effects of healthy lifestyle behaviors on all cause mortality: a systematic review and meta-analysis

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