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Construction workers pouring and leveling concrete slab. Aerial view of construction crew wearing safety vests as they pour, spread, and level wet concrete on a building roof.
Caucasian man builder architect call mobile phone male engineer in helmet work at construction site control building process foreman industrial worker talking cellphone command architecture project
Industrial engineer teamwork working maintenance building exterior cooling systems. Male technician worker in safety uniform working and inspect pipeline valves air HVAC systems at construction site
Caucasian team colleagues builders discuss blueprint building in construction guys foremen supervisors controlling industrial project draft site paper woman architects manufacturing handymen talking

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