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    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
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    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
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Old industrial corridor in historical factory, Georgetown, Washington, USA — Stock Photo
    Old industrial corridor in historical factory, Georgetown, Washington, USA
    Close-up of valve oil barrels in industrial mechanical workshop — Stock Photo
    Close-up of valve oil barrels in industrial mechanical workshop
    Front view of senior Caucasian farmer fixing large irrigation water pipe valve in the field at farm — Stock Photo
    Front view of senior Caucasian farmer fixing large irrigation water pipe valve in the field at farm
    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
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    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
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    Mechanic checking a car parts in repair garage — Stock Photo
    Mechanic checking a car parts in repair garage
    Rusty metal valve of old radiator for temperature regulation in room at home — Stock Photo
    Rusty metal valve of old radiator for temperature regulation in room at home
    Human heart anatomy showing tricuspid valve, cross section illustration. — Stock Photo
    Human heart anatomy showing tricuspid valve, cross section illustration.
    Close-up of worker operating the gas cylinder in scrapyard — Stock Photo
    Close-up of worker operating the gas cylinder in scrapyard
    Medical illustration of artificial heart valve. — Stock Photo
    Medical illustration of artificial heart valve.
    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
    Shiny metal sink with chrome tap installed near potted plant in contemporary kitchen — Stock Photo
    Shiny metal sink with chrome tap installed near potted plant in contemporary kitchen
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Dried marijuana flower buds on table with analytical balance and moisture measuring device in lab — Stock Photo
    Dried marijuana flower buds on table with analytical balance and moisture measuring device in lab
    Closeup view of Abalone mussel with herb on salt — Stock Photo
    Closeup view of Abalone mussel with herb on salt
    Man checking gauge while making beer at home brewery — Stock Photo
    Man checking gauge while making beer at home brewery
    Dried marijuana flower buds on table with analytical balance and moisture measuring device against protective glasses in lab — Stock Photo
    Dried marijuana flower buds on table with analytical balance and moisture measuring device against protective glasses in lab
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Back view of crop unrecognizable male engineer ascending ladder against metal vessel in beer factory — Stock Photo
    Back view of crop unrecognizable male engineer ascending ladder against metal vessel in beer factory
    Engineer in electric power plant inspecting manual valve in condenser room piping — Stock Photo
    Engineer in electric power plant inspecting manual valve in condenser room piping
    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
    Indoors view of Pipeline in a water treatment plant — Stock Photo
    Indoors view of Pipeline in a water treatment plant
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    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
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    Human heart with colored tricuspid valve, computer illustration. — Stock Photo
    Human heart with colored tricuspid valve, computer illustration.
    Light bulbs and valve bulbs, X-ray. — Stock Photo
    Light bulbs and valve bulbs, X-ray.
    Copper brew kettle — Stock Photo
    Copper brew kettle
    First-aiders practicing cardiopulmonary resuscitation on training dummy. — Stock Photo
    First-aiders practicing cardiopulmonary resuscitation on training dummy.
    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
    Medical illustration of human heart interior — Stock Photo
    Medical illustration of human heart interior
    Steel frosted pipe with stopcock covered and fixed with bolt and brought to large stainless steel vessel in light laboratory — Stock Photo
    Steel frosted pipe with stopcock covered and fixed with bolt and brought to large stainless steel vessel in light laboratory
    Man stirring beer in work while making beer at home brewery — Stock Photo
    Man stirring beer in work 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
    Rear view of mechanic working in repair garage — Stock Photo
    Rear view of mechanic working in repair garage
    Schematic representation of human vein structure — Stock Photo
    Schematic representation of human vein structure
    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
    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
    Close-up of man fixing pipe to beer wort to make beer at home brewery — Stock Photo
    Close-up of man fixing pipe to beer wort to make beer at home brewery
    Female power engineer checking pressure transducers at power plant — Stock Photo
    Female power engineer checking pressure transducers at power plant
    Human heart with colored pulmonary valve, computer illustration. — Stock Photo
    Human heart with colored pulmonary valve, computer illustration.
    Human heart anatomy showing bicuspid valve, illustration. — Stock Photo
    Human heart anatomy showing bicuspid valve, illustration.
    Engineer in electric power plant inspecting a electrically controlled valve — Stock Photo
    Engineer in electric power plant inspecting a electrically controlled valve
    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
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Cropped image of man holding valve of machinery at brewery — Stock Photo
    Cropped image of man holding valve of machinery at brewery
    Man wearing apron checking temperature while making beer at home brewery — Stock Photo
    Man wearing apron checking temperature while making beer at home brewery
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Human heart anatomy showing valves, cross section illustration. — Stock Photo
    Human heart anatomy showing valves, cross section illustration.
    Pest control technician adding water to chemical container in truck — Stock Photo
    Pest control technician adding water to chemical container in truck
    Heart cutout view with pulmonary valve, mitral valve and tricuspid — Stock Photo
    Heart cutout view with pulmonary valve, mitral valve and tricuspid
    Copper beer distillery chamber — Stock Photo
    Copper beer distillery chamber
    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.