Ключевые слова:
Electric conduits, Pipe fittings, Non-metals, Solid electrical insulating materials, Electrical insulating materials, Testing conditions, Marking, Impact testing, Thermal testing, Thermal resistance, Fire tests, Dielectric-strength tests, Test equipment, Spacers, Design, Dimensions, Pipe couplings, Screwed fittings, Bushes (mechanical components), Locknuts, Locking and locating devices, Elbows (pipes), Pipe tees, Bend couplings