Ключевые слова: alloy, automotive, ball, body, bolts, buttwelded, carbon, cast, clean, closeup, concept, conduit, connection, conservation, construction, design, dump, engine, engineering, environment, facility, flange, forging, gas, handle, industry, joint, machine, machined, manufacture, manufacturing, mashine, mechanical, metal, metallic, nuts, oil, part, pipeline, screw, screwed, shiny, shutoff, stack, stainless, steel, technician, tool, valve,