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    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    View of Heart valves — Stock Photo
    View of Heart valves
    Close-up of valve oil barrels and gallon in workshop — Stock Photo
    Close-up of valve oil barrels and gallon in workshop
    Indoors view of Pumps in a water treatment plant — Stock Photo
    Indoors view of Pumps in a water treatment plant
    Mechanic checking a car parts in repair garage — Stock Photo
    Mechanic checking a car parts in repair garage
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Female power engineer adjusting pressure valve at power station — Stock Photo
    Female power engineer adjusting pressure valve at power station
    Valve on beer worts to make beer at home brewery — Stock Photo
    Valve on beer worts to make beer at home brewery
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Human heart anatomy showing aortic valve, cross section illustration. — Stock Photo
    Human heart anatomy showing aortic valve, cross section illustration.
    Human heart anatomy showing tricuspid valve, cross section illustration. — Stock Photo
    Human heart anatomy showing tricuspid valve, cross section illustration.
    Crop unrecognizable male worker in mask washing valve of metal tank at work in brewing company — Stock Photo
    Crop unrecognizable male worker in mask washing valve of metal tank at work in brewing company
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Vintner in lab coat and hard hat examining stainless steel vat in cellar — Stock Photo
    Vintner in lab coat and hard hat examining stainless steel vat in cellar
    Various metal containers placed near shabby building wall and water tap on street of town in Gambia — Stock Photo
    Various metal containers placed near shabby building wall and water tap on street of town in Gambia
    Old industrial corridor in historical factory, Georgetown, Washington, USA — Stock Photo
    Old industrial corridor in historical factory, Georgetown, Washington, USA
    Industrial engineer turning valve on pipe at fuel tank at a power plant — Stock Photo
    Industrial engineer turning valve on pipe at fuel tank at a power plant
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Man lifting wort to make beer at home brewery — Stock Photo
    Man lifting wort to make beer at home brewery
    Glass of barley, flask and beer bottle on beer worts to make beer at home brewery — Stock Photo
    Glass of barley, flask and beer bottle on beer worts to make beer at home brewery
    Side view of senior Caucasian male farmer repairing valve pipe on the field in farm on a sunny day — Stock Photo
    Side view of senior Caucasian male farmer repairing valve pipe on the field in farm on a sunny day
    Copper brew kettle — Stock Photo
    Copper brew kettle
    Side view of positive young lady in lab coat checking valves on piping system in industrial facility — Stock Photo
    Side view of positive young lady in lab coat checking valves on piping system in industrial facility
    Medical illustration of artificial heart valve. — Stock Photo
    Medical illustration of artificial heart valve.
    Engineer in electric power plant inspecting a electrically controlled valve — Stock Photo
    Engineer in electric power plant inspecting a electrically controlled valve
    Human heart anatomy showing mitral valve, digital illustration. — Stock Photo
    Human heart anatomy showing mitral valve, digital illustration.
    Gloved hands of foreman working on equipment with valve on factory — Stock Photo
    Gloved hands of foreman working on equipment with valve on factory
    Back view of male engineer taking notes on paper on metal vessel in beer factory — Stock Photo
    Back view of male engineer taking notes on paper on metal vessel in beer factory
    Side view of crop male worker in mask washing valve of metal tank at work in brewing company during pandemic — Stock Photo
    Side view of crop male worker in mask washing valve of metal tank at work in brewing company during pandemic
    3d rendered illustration of diseased heart valve on white background. — Stock Photo
    3d rendered illustration of diseased heart valve on white background.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Stavanger norway oil rig pumps — Stock Photo
    Stavanger norway oil rig pumps
    Human heart anatomy showing bicuspid valve, illustration. — Stock Photo
    Human heart anatomy showing bicuspid valve, illustration.
    Man testing temperature of beer in wort while making beer at home brewery — Stock Photo
    Man testing temperature of beer in wort while making beer at home brewery
    Human heart anatomy showing tricuspid valve, digital illustration. — Stock Photo
    Human heart anatomy showing tricuspid valve, digital illustration.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Medical illustration of human heart interior — Stock Photo
    Medical illustration of human heart interior
    Aerial view of a pipeline with a value and coupling in a green field, West of Calgary; Alberta, Canada — Stock Photo
    Aerial view of a pipeline with a value and coupling in a green field, West of Calgary; Alberta, Canada
    Medical illustration of artificial heart valve. — Stock Photo
    Medical illustration of artificial heart valve.
    First-aiders practicing cardiopulmonary resuscitation on training dummy. — Stock Photo
    First-aiders practicing cardiopulmonary resuscitation on training dummy.
    Student in wheelchair examining fuel control valves on furnace in HVAC classroom — Stock Photo
    Student in wheelchair examining fuel control valves on furnace in HVAC classroom
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Man wearing apron checking temperature while making beer at home brewery — Stock Photo
    Man wearing apron checking temperature while making beer at home brewery
    Construction workers preparing to lift gate valve for water main — Stock Photo
    Construction workers preparing to lift gate valve for water main
    Female power engineer adjusting pressure valve at power station — Stock Photo
    Female power engineer adjusting pressure valve at power station
    Gas well valve in gas pipeline in desert of United Arab Emirates. — Stock Photo
    Gas well valve in gas pipeline in desert of United Arab Emirates.
    Man pouring sack of barley into wort to make beer at home brewery — Stock Photo
    Man pouring sack of barley into wort to make beer at home brewery
    Gloved hands of unrecognizable male master in turning industrial machine valve during work on factory — Stock Photo
    Gloved hands of unrecognizable male master in turning industrial machine valve during work on factory
    Human heart anatomy showing valves, cross section illustration. — Stock Photo
    Human heart anatomy showing valves, cross section illustration.
    Close-up of man fixing valve to beer wort to make beer at home brewery — Stock Photo
    Close-up of man fixing valve to beer wort to make beer at home brewery
    Light bulbs and valve bulbs, X-ray. — Stock Photo
    Light bulbs and valve bulbs, X-ray.
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Cardiopulmonary resuscitation training dummies. — Stock Photo
    Cardiopulmonary resuscitation training dummies.
    Row of colored metal faucets with valves and pipes transferring hot and cold water on plant — Stock Photo
    Row of colored metal faucets with valves and pipes transferring hot and cold water on plant
    Man wearing apron making beer at home brewery — Stock Photo
    Man wearing apron making beer at home brewery
    Interior of brewery, large steel pipes, valves and control unit for the brewing process — Stock Photo
    Interior of brewery, large steel pipes, valves and control unit for the brewing process
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Man testing temperature of beer in wort while making beer at home brewery — Stock Photo
    Man testing temperature of beer in wort while making beer at home brewery
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant