Ключевые слова: abstract, alliance, background, belong, black, blue, blur, bolt, bolt shaft, bond, clasp, cohesion, cohesiveness, concept, concrete, connection, cooperation, coupling, firm, gray, grey, head, helix, hexagon, hoop, idea, industrial, iron, joint, material, metal, metallic, metric, no people, nopeople, nut, pole, ring, screw, screw head, silver, spring washer, steel, strong, symbol, symbolize, technical, thread, together, union, washer, white, zinc,