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Two students work on sweating a joint during a class in AC installation and  repair
The engineer inspects the safety equipment on the fire extinguishing system.
Engineer use laptop to inspection pipeline and valve of service water supply in fire riser room. Multi-Ethnic Blue-collar worker and technician testing fire suppression system. Fire protection concept
Truck mechanic is checking safety using digital tablet.
Male Worker Inspecting Water Valve For Leaks In Basement
Two Aircraft engineers and mechanics in the hangar repairing and maintaining private helicopter.
Male mechanics with voltage tester working on helicopter engine in hangar.
Technician Looking For a Gas Leak Using Digital Gas Detector. Safety Check.
Technician is checking air conditioner ,measuring equipment for filling air conditioners.
Electric technician working on a fuse box or switch board, using pliers or engineering tool. Male electrician doing complex installation and connection of electrical equipment and wiring cables.
Engineer or technician work checking Fire suppression system and fire equipment. Engineer check red generator pump for water sprinkler piping and fire alarm control system
female boiler room operative
Senior specialist engineer wearing green safety jacket hold digital tablet working preventive maintenance industrial HVAC machinery
Aircraft engineer fixing jet engine and using multimeter, close up. Air vehicle mechanic examining helicopter, side view
Male firefighter demonstrating mechanism of fire engine and giving advice to trainee during work on station
Engineer inspection Industrial fire control system
Man Servicing Outdoor Air Conditioning Unit
One senior man teaching his grandson how to repair vehicles  and pass down the business
Female worker holding blueprints while inspecting electrical switchboard at construction site, copy space
Lyon, France: A firefighter preparing for intervention in Lyon
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
Aircraft engineers in reflective vests examining helicopter engine, using multimeter, close view. Air vehicle mechanics in protective workwear working in hangar, side view
male caucasian operator operating industrial printing press
A mature man with a thick beard and large build working as a concrete boom pump operator, walking next to a truck, looking at the camera with a serious expression. This is part of a series showing workers operating concrete pump trucks at a construction site.
Selective focus of car air conditioning technician's hand refilling car air conditioner refrigerant
Plane engine dismantle - Paris.
engineer repairs air conditioner
Marine engineer officer in engine control room ECR. Seamen's work. He starts or stops main engine of ship
Technician Checking Heating System In The Boiler Room With Tablet In Hand
Free Images: "bestof:Gas Turbine Systems Technician (Mechanical) Fireman Keith Lovall from Valparaiso, Ind., transits to a simulated class bravo fire during an engineering training"
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