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    Male adult engineer in water treatment plant — Stock Photo
    Male adult engineer in water treatment plant
    Metal fermentation valves in rows — Stock Photo
    Metal fermentation valves in rows
    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
    3d rendered illustration of diseased heart valve on white background. — Stock Photo
    3d rendered illustration of diseased heart valve on white background.
    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
    Close-up of gas cylinders in garage — Stock Photo
    Close-up of gas cylinders in garage
    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
    Gas Compression Station on background — Stock Photo
    Gas Compression Station on background
    Female power engineer adjusting water valves at power plant — Stock Photo
    Female power engineer adjusting water valves at power plant
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    First-aiders practicing cardiopulmonary resuscitation on training dummy. — Stock Photo
    First-aiders practicing cardiopulmonary resuscitation on training dummy.
    Valve on beer worts to make beer at home brewery — Stock Photo
    Valve on beer worts to make beer at home brewery
    Endobronchial valves fitted to treat tuberculosis — Stock Photo
    Endobronchial valves fitted to treat tuberculosis
    Mannequin placed next to industrial pipework — Stock Photo
    Mannequin placed next to industrial pipework
    Frozen pipeline valve installed on metal tube transferring liquid nitrogen at oil and gas processing factory — Stock Photo
    Frozen pipeline valve installed on metal tube transferring liquid nitrogen at oil and gas processing 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
    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 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
    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
    Female power engineer adjusting pressure valve at power station — Stock Photo
    Female power engineer adjusting pressure valve at power station
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Human heart with colored tricuspid valve, computer illustration. — Stock Photo
    Human heart with colored tricuspid valve, computer 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
    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
    Partial view of oil storage tank. — Stock Photo
    Partial view of oil storage tank.
    Female power engineer adjusting pressure valve at power station — Stock Photo
    Female power engineer adjusting pressure valve at power station
    Worker closing the cylinder tap in scrapyard — Stock Photo
    Worker closing the cylinder tap in scrapyard
    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 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
    Indoors view of Pumps in a water treatment plant — Stock Photo
    Indoors view of Pumps in a water treatment plant
    Human heart with colored mitral valve, computer illustration. — Stock Photo
    Human heart with colored mitral valve, computer illustration.
    Human vein showing tissue stratification — Stock Photo
    Human vein showing tissue stratification
    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
    Man lifting wort to make beer at home brewery — Stock Photo
    Man lifting wort to make beer at home brewery
    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
    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.
    Construction workers preparing to lift gate valve for water main — Stock Photo
    Construction workers preparing to lift gate valve for water main
    Human heart with colored pulmonary valve, computer illustration. — Stock Photo
    Human heart with colored pulmonary valve, computer illustration.
    Aortic valve, computer illustration. — Stock Photo
    Aortic valve, computer illustration.
    Human heart anatomy showing aortic valve, cross section illustration. — Stock Photo
    Human heart anatomy showing aortic valve, cross section illustration.
    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
    Anatomy of heart interior with labels — Stock Photo
    Anatomy of heart interior with labels
    Closeup view of one grilled scallop on shell — Stock Photo
    Closeup view of one grilled scallop on shell
    Human heart anatomy showing mitral valve, digital illustration. — Stock Photo
    Human heart anatomy showing mitral valve, digital illustration.
    Cardiopulmonary resuscitation training dummies. — Stock Photo
    Cardiopulmonary resuscitation training dummies.
    Prosthetic heart valves — Stock Photo
    Prosthetic heart valves
    Control panel american fire truck — Stock Photo
    Control panel american fire truck
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Female power engineer checking injectors with compressed gas at power station — Stock Photo
    Female power engineer checking injectors with compressed gas at power station
    Human heart anatomy showing tricuspid valve, digital illustration. — Stock Photo
    Human heart anatomy showing tricuspid valve, digital illustration.
    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
    Doctors practicing bag-valve-mask ventilation on training dummy. — Stock Photo
    Doctors practicing bag-valve-mask ventilation on training dummy.
    Man lifting wort to make beer at home brewery — Stock Photo
    Man lifting wort to make beer at home brewery
    Contemporary kitchen with gas and electric stoves under hood against wall reflecting house in daytime — Stock Photo
    Contemporary kitchen with gas and electric stoves under hood against wall reflecting house in daytime
    View of Heart valves — Stock Photo
    View of Heart valves
    View of Mitral valve — Stock Photo
    View of Mitral valve
    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 wearing apron making beer at home brewery — Stock Photo
    Man wearing apron making 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