Rain water droplets repelled on new cement surface Rain water droplets repelled on new cement surface Empty parking deck with ramp in parking building Oil and gas processing plant with pipe line valves.Steel pipelines and valves.Oil pipeline valves in the oil and gas industry. Rain water droplets repelled on new cement surface Rusty steel pipe with heat insulation on construction site Sewage Treatment Plant Decontaminates WasteWater. High quality photo Rusty steel pipe with heat insulation on construction site Rusty steel pipe with heat insulation on construction site Rain water droplets repelled on new cement surface waste water treatment process on hospital Metallic pipes covered with orange paint. Background with perspective. Selective focus Mechanical industry, gear-cutting production, manufacture of gears and shafts on a gear-cutting machine with a milling cutter, oil-cooled Disassembled steam turbine in the process of repairing an electric generator at a power plant steam turbine in repair process, machinery, pipes, tubes, at an power plant Horizontal image of empty underground parking lot metal mold for the production of plastic moldings for the automotive industry. Metal products in the warehouse, large round shafts lie on a wooden rack in the factory in the shop.