Ключевые слова: alloy, background, building, bunch, business, chrome plated, closeup, construction, detail, engineering, equipment, faceted, facility, factory, fastener, female screw, fixing, group, industry, iron, lot, male screw, manufactory, many, metal, nut, polished, repairs, screw, screw nut, set, stainless, steel, technique, technology, washer, work, workshop, zinc,