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    Petroleum refinery construction in blue cloudy sky — Stock Photo
    Petroleum refinery construction in blue cloudy sky
    Group of male technicians in uniform working with alternative solar panels and preparing for installation near residential building — Stock Photo
    Group of male technicians in uniform working with alternative solar panels and preparing for installation near residential building
    From below side view of male technician in work wear standing on scaffolding and preparing for installation of solar panel on wooden construction — Stock Photo
    From below side view of male technician in work wear standing on scaffolding and preparing for installation of solar panel on wooden construction
    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
    View of modern industrial buildings with pipes and road along workshops in Aviles — Stock Photo
    View of modern industrial buildings with pipes and road along workshops in Aviles
    Group of workers in uniform and helmets installing photovoltaic panels on roof of wooden construction near house — Stock Photo
    Group of workers in uniform and helmets installing photovoltaic panels on roof of wooden construction near house
    Metal staircase in spacious industrial workshop near shabby metal wall inside of modern industrial building in Asturias — Stock Photo
    Metal staircase in spacious industrial workshop near shabby metal wall inside of modern industrial building in Asturias
    Low angle of manometer measuring gas pressure in pipes at plant in industrial area — Stock Photo
    Low angle of manometer measuring gas pressure in pipes at plant in industrial area
    Interior of spacious industrial workshop with large metal construction with staircases in large industrial workshop in Asturias — Stock Photo
    Interior of spacious industrial workshop with large metal construction with staircases in large industrial workshop in Asturias
    Exterior of plant with walls covered with plasterboard during renovation and prepared for plastering — Stock Photo
    Exterior of plant with walls covered with plasterboard during renovation and prepared for plastering
    Industrial pipes with cloudy sky illuminated at night — Stock Photo
    Industrial pipes with cloudy sky illuminated at night
    Airship propeller part, Zeppelin Museum, Friedrichshafen, Baden-Wrttemberg, Germany, Europe — Stock Photo
    Airship propeller part, Zeppelin Museum, Friedrichshafen, Baden-Wrttemberg, Germany, Europe
    Close-up view of sediments on rocks in Riotinto, Huelva — Stock Photo
    Close-up view of sediments on rocks in Riotinto, Huelva
    Gloved hands of unrecognizable foreman pouring chemical liquid from canister into metal barrel in factory — Stock Photo
    Gloved hands of unrecognizable foreman pouring chemical liquid from canister into metal barrel in factory
    Gloved hands of male employee pouring chemical liquid from canister into metal barrel in factory — Stock Photo
    Gloved hands of male employee pouring chemical liquid from canister into metal barrel in factory
    Gloved hands of unrecognizable handyman using machine on factory — Stock Photo
    Gloved hands of unrecognizable handyman using machine on factory
    Gloved hands of foreman working on equipment with valve on factory — Stock Photo
    Gloved hands of foreman working on equipment with valve on factory
    Gloved hands of anonymous professional male repairman sawing metal detail with hacksaw during work in factory — Stock Photo
    Gloved hands of anonymous professional male repairman sawing metal detail with hacksaw during work in factory
    Caustic and acid mixing area of electric power plant — Stock Photo
    Caustic and acid mixing area of electric power plant
    Gloved hands of unrecognizable man checking equipment and preparing for work at workshop — Stock Photo
    Gloved hands of unrecognizable man checking equipment and preparing for work at workshop
    Gloved hands of male creating detail while working on industrial machine at workshop — Stock Photo
    Gloved hands of male creating detail while working on industrial machine at workshop
    Power station control panels and cable troughs at electric power plant — Stock Photo
    Power station control panels and cable troughs at electric power plant
    Control valves for low and intermediate pressure area flow at electric gas turbine plant — Stock Photo
    Control valves for low and intermediate pressure area flow at electric gas turbine plant
    Caustic and acid mixing area of electric power plant — Stock Photo
    Caustic and acid mixing area of electric power plant
    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
    Condensate and water collection ducting at power plant — Stock Photo
    Condensate and water collection ducting at power plant
    Caustic and acid mixing area of electric power plant — Stock Photo
    Caustic and acid mixing area of electric power plant
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace and preparing instrument for soldering — Stock Photo
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace and preparing instrument for soldering
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop — Stock Photo
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Caustic and acid mixing area of electric power plant — Stock Photo
    Caustic and acid mixing area of electric power plant
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop — Stock Photo
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace — Stock Photo
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace
    Welding torch hanging on metal frame in workshop with metal door in background — Stock Photo
    Welding torch hanging on metal frame in workshop with metal door in background
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace and preparing instrument for soldering while looking away — Stock Photo
    Professional man with welding mask on head wearing jeans overalls and protective gloves standing on workplace and preparing instrument for soldering while looking away
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop — Stock Photo
    Views from tree branch leaves of professional master in protective face mask soldering metal while working in small workshop
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction — Stock Photo
    Side view of craftsman in protective face mask wearing overalls and gloves working in workshop and soldering metal construction
    Closeup of metal sheet with part cut into geometric pieces — Stock Photo
    Closeup of metal sheet with part cut into geometric pieces
    Professional male engineers in hard hats working in the factory — Stock Photo
    Professional male engineers in hard hats working in the factory
    Technical personnel in white coat working with laptop computer in the voltage room — Stock Photo
    Technical personnel in white coat working with laptop computer in the voltage room
    Technical personnel in the factory fire control room inspection — Stock Photo
    Technical personnel in the factory fire control room inspection
    Professional male engineer in hard hat working in the factory fire control room inspection — Stock Photo
    Professional male engineer in hard hat working in the factory fire control room inspection
    Technical personnel in hard hats working together in the factory inspection — Stock Photo
    Technical personnel in hard hats working together in the factory inspection
    Professional male and female engineers in hard hats working in the factory fire control room inspection — Stock Photo
    Professional male and female engineers in hard hats working in the factory fire control room inspection
    Professional male and female engineers in hard hats working in the factory fire control room inspection — Stock Photo
    Professional male and female engineers in hard hats working in the factory fire control room inspection
    Chinese colleagues working together in the factory inspection — Stock Photo
    Chinese colleagues working together in the factory inspection
    Professional male and female engineers in hard hats working in the factory fire control room inspection — Stock Photo
    Professional male and female engineers in hard hats working in the factory fire control room inspection
    Professional male engineer in hard hat working in the factory fire control room inspection — Stock Photo
    Professional male engineer in hard hat working in the factory fire control room inspection
    Professional male engineers in hard hats working in the factory — Stock Photo
    Professional male engineers in hard hats working in the factory
    Chinese engineers in hard hats working together in the factory inspection — Stock Photo
    Chinese engineers in hard hats working together in the factory inspection
    Chinese colleagues working together in the factory inspection — Stock Photo
    Chinese colleagues working together in the factory inspection
    Technical personnel in white coat smiling at camera while working in the voltage room — Stock Photo
    Technical personnel in white coat smiling at camera while working in the voltage room
    Chinese engineers in hard hats working together in the factory inspection — Stock Photo
    Chinese engineers in hard hats working together in the factory inspection