Ключевые слова: butt, connect, construction, device, electric, engineering, equipment, extrusion, fitting, fixture, fusion, hdpe, header, heat, heater, hot, hydraulic, industrial, industry, iron, joint, loop, machine, manifold, melt, pipe, pipeline, piping, plastic, plumber, polypropylene, pressure, project, ring, sewage, socket fusion, soldering, soldering iron, spanner, tap, technique, technology, tool, tube, water, welder, welding, wrench,