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Close up corrosion and pitting control with gauge
CU, Japanese man is cutting concrete with a tool.
Red firestop sealant on firerated wall next to electrical conduit
Sump Pit Drainage System checking by mature worker. Water damage in basement and repair works
Old ceiling mounted glass drain, vent, pipes in school science room or laboratory. Glass pipe is resistant to corrosive wastes such as acids. Unusual plumbing materials.
An architectural detail from a technical service building demonstrating handling of cables via cable trays (aka overhead cable management racks).
Hole in wall. Home repair. Concrete surface. Ventilation in apartment. Air hole.
Ground bar for electrical installation.
Worker making an HVAC air duct
Close-up of a total positioning station tachymeter in the box, prism pole, line marking spray paint, and lump hammer taken by site engineer on site for roadworks survey
Photo of black asbestos mastic on pipe insulation true a block wall in a mechanical room.
Submerged arc welding
Covering a surface by refractory composition.
Construction site
poor drainage design and construction. water puddle on building roof due to too little slope. potential water leaking from the roof.
Improved home, new wire path on the wall
Foreman checking the underfloor space.
Grounding wires provide effective protection against electric shock.
Foundation waterproofing and structural support for ground floor slab preparation.
Blue collar worker are working at construction site. Blue collar and engineering concept.
Drilled hole into a concrete wall with core driller
Environmental continuous extruded soil sampling methods using sonic drilling rig. Photograph depicting soil core samples extruded into plastic sleeve and opened for inspection.
two air conditioner hoses are rotten and old with a hole in the building wall
Inspector taking photos of wet basement walls and floor after water damage. Mature gray haired man in vest and glasses highlighting spillage on basement floor and walls
Technician working on construction site
A power plug box on the cement floor form a black metal stand.
Installation of the roof deicing, self regulating heating cables on the metal industrial rain gutter.
Close-up on a rusted panel in a metal fence
Gas ring in torch system of the closed type, appearance. An asbestine covering in a torch.
Close up detail structure of railway line in sky train
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