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Resistance test of temperature sensors in the cooling supply section of the ventilation unit.
control room engineers
Technician Checking Heating System In The Boiler Room With Tablet In Hand
Contractor installing and repairing water pumping station. Borehole water pump.
Technician is checking air conditioner,measuring equipment for filling air conditioners.
One senior man teaching his grandson how to repair vehicles  and pass down the business
Male Worker Inspecting Water Valve For Leaks In Basement
From below of crop anonymous firefighter in uniform with colorful lines and protective glasses with helmet taking black hose of manual pump while standing near fire truck. Fire extinguishing concept
Close-up Air conditioner technician hand check  fill refrigerant liquid and maintenance condenser unit, Home care service
Truck mechanic is checking safety using digital tablet.
Engineer inspection Industrial fire control system
Technician repairing the boiler
Fire Fighters
female firefighter
Young Indigenous Navajo Firefighter in the Fire Station in full fire protective gear, turnout, Getting In To Fire Engine in Monument Valley Utah
Technician is checking air conditioner ,measuring equipment for filling air conditioners.
Senior specialist engineer wearing green safety jacket hold digital tablet working preventive maintenance industrial HVAC machinery
Full length side view of early 30s woman in turnout gear and helmet scaling ladder on back of parked fire engine.
Electrical engineers check the operation of the main electrical control panels and switches, record values on tablets, electrician inspect the electrical systems in the factory.
Young engineer working on electrical equipment using safety procedures
Close-up of a man's hand with fire equipment in a fire truck. Man turns control levers
Technician repairing combi Gas Boiler
All machines nead maintains. Professional technician troubleshooting and repair the machines in the printing house.
A male safety officer is checking the safety of the equipment
Engineers inspected the electrical switchboard and verified the operational voltage range. Technician setting electrical in inverter solar panel room
Water pump in Car fire engine
male caucasian operator operating industrial printing press
Firefighter called for an emergency gets into a fire engine
Mechanical engineer in latex gloves removing bearings from an armature on his workbench in a pump room
Close up on hands of a Black male reaching towards a holder attached to a CNC machine with many varieties of milling bits on.
Free Images: "bestof:George action 120209-N-VY256-134.jpg en Gas Turbine Systems Technician Mechanical Fireman Kevin Herrera sweeps water over the side of the ship during a"
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US_Navy_080113-N-8933S-043_Information_Systems_Technician_2nd_Class_Mark_Heier,_assigned_to_the_amphibious_dock_landing_ship_USS_Fort_McHenry_(LSD_43)_as_part_of_Africa_Partnership_Station_(APS),_plays_soccer_with_local_Gabones.jpg
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US_Navy_111012-N-NW885-009_Gas_Turbine_Systems_Technician_(Mechanical)_3rd_Class_Corey_Callies_presents_a_wreath_at_the_USS_Cole_Memorial_during_a.jpg
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US_Navy_100501-N-8959T-272_Culinary_Specialist_Seaman_Anthony_Chance,_left,_Ship's_Serviceman_1st_Class_Johnny_Williams,_center,_and_Gas_Turbine_Systems_Technician_(Mechanical)_3rd_Class_Antoine_Porter.jpg
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