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    Engineer in electric power plant adjusting manual valve in condenser room piping — Stock Photo
    Engineer in electric power plant adjusting manual valve in condenser room piping
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Female power engineer checking pressure transducers at power plant — Stock Photo
    Female power engineer checking pressure transducers at power plant
    Female power engineer checking valve at power station — Stock Photo
    Female power engineer checking valve at power station
    Man wearing apron checking temperature while making beer at home brewery — Stock Photo
    Man wearing apron checking temperature while making beer at home brewery
    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
    Vintner checking stainless steel vat in winery cellar — Stock Photo
    Vintner checking stainless steel vat in winery cellar
    Worker closing the cylinder tap in scrapyard — Stock Photo
    Worker closing the cylinder tap in scrapyard
    Female power engineer checking pressure transducers at power plant — Stock Photo
    Female power engineer checking pressure transducers at power plant
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Human heart anatomy showing pulmonary valve, illustration. — Stock Photo
    Human heart anatomy showing pulmonary valve, illustration.
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    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 valves, cross section illustration. — Stock Photo
    Human heart anatomy showing valves, cross section illustration.
    Human heart with colored pulmonary valve, computer illustration. — Stock Photo
    Human heart with colored pulmonary valve, computer illustration.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    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
    Copper distillery or fermentation chamber — Stock Photo
    Copper distillery or fermentation chamber
    Close-up of gas cylinders in garage — Stock Photo
    Close-up of gas cylinders in garage
    Millennial man and father in law working on old classic car together — Stock Photo
    Millennial man and father in law working on old classic car together
    Gloved hands of foreman working on equipment with valve on factory — Stock Photo
    Gloved hands of foreman working on equipment with valve on factory
    Valve on beer worts to make beer at home brewery — Stock Photo
    Valve on beer worts to make beer at home brewery
    Close-up of valve oil barrels and gallon in workshop — Stock Photo
    Close-up of valve oil barrels and gallon in workshop
    Close-up of valve oil barrels in industrial mechanical workshop — Stock Photo
    Close-up of valve oil barrels in industrial mechanical workshop
    Anatomy of heart interior with labels — Stock Photo
    Anatomy of heart interior with labels
    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
    Closeup view of Abalone mussel with herb on salt — Stock Photo
    Closeup view of Abalone mussel with herb on salt
    Closeup view of one grilled scallop on shell — Stock Photo
    Closeup view of one grilled scallop on shell
    Man stirring beer in work while making beer at home brewery — Stock Photo
    Man stirring beer in work while making 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
    Man lifting wort to make beer at home brewery — Stock Photo
    Man lifting wort to make beer at home brewery
    Computer illustration of a blood clot inside vein, known as venous thrombus. — Stock Photo
    Computer illustration of a blood clot inside vein, known as venous thrombus.
    Overhead view of valve covers, rockers, and heads in a mechanics shop — Stock Photo
    Overhead view of valve covers, rockers, and heads in a mechanics shop
    View of Mitral valve — Stock Photo
    View of Mitral valve
    Gas Compression Station on background — Stock Photo
    Gas Compression Station on background
    Portrait of a confident man wearing apron standing at home brewery — Stock Photo
    Portrait of a confident man wearing apron standing at home brewery
    Man holding sack of barley into wort to make beer at home brewery — Stock Photo
    Man holding sack of barley into wort to make beer at home brewery
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Contemporary kitchen with stoves under hood against wall reflecting house in daytime — Stock Photo
    Contemporary kitchen with stoves under hood against wall reflecting house in daytime
    Old industrial corridor in historical factory, Georgetown, Washington, USA — Stock Photo
    Old industrial corridor in historical factory, Georgetown, Washington, USA
    Construction workers preparing to lift gate valve for water main — Stock Photo
    Construction workers preparing to lift gate valve for water main
    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 Pumps in a water treatment plant — Stock Photo
    Indoors view of Pumps in a water treatment plant
    Engineer in electric power plant inspecting a electrically controlled valve — Stock Photo
    Engineer in electric power plant inspecting a electrically controlled valve
    Close-up of glasses of barley on beer worts to make beer at home brewery — Stock Photo
    Close-up of glasses of barley on beer worts to make beer at home brewery
    Painted valves and pipes — Stock Photo
    Painted valves and pipes
    Heart cutout view with pulmonary valve, mitral valve and tricuspid — Stock Photo
    Heart cutout view with pulmonary valve, mitral valve and tricuspid
    Medical illustration of artificial heart valve. — Stock Photo
    Medical illustration of artificial heart valve.
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Close-up view of male farmer repairing valve pipe in farm on a sunny day — Stock Photo
    Close-up view of male farmer repairing valve pipe in farm on a sunny day
    Human heart with colored pulmonary valve, computer illustration. — Stock Photo
    Human heart with colored pulmonary valve, computer illustration.
    A garage or auto repair shop air pressure valve with compressor machine — Stock Photo
    A garage or auto repair shop air pressure valve with compressor machine
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    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
    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
    First-aiders practicing cardiopulmonary resuscitation on training dummy. — Stock Photo
    First-aiders practicing cardiopulmonary resuscitation on training dummy.