Ключевые слова: abstract, attached, background, blue, business, caution, chain, chained, clasp, clasplock, close, closure, concept, debt, design, detail, door, equipment, fence, guard, iron, isolated, lock, metal, metallic, object, padlock, privacy, private, protect, protection, red, restraint, safe, safety, secrecy, secure, security, sign, stability, steel, strength, strong, symbol, tool, under, view, white,