Ключевые слова: abstract, attach, background, big, build, business, chain, close, closure, cohesion, collection, conclude, connection, construction, element, endless, fixed, group, hold, important, industrial, industry, infinity, iron, link, linkage, long, metal, metallic, new, object, open, optional, pattern, protection, pull, safety, security, set, silver, stability, steel, strength, strong, symbol, team, teamwork, tight, white, wide,