Ключевые слова: access control, antitheft, chain links, chains, chains and locks, combination, durable, guarded, hardware, heavyduty, industrial, industrial security, isolated, keyed, keyed alike, keyless, lock and key, locking mechanism, locks, metal, padlocks, protection, reliable, resilient, robust, safety, secure, security, security system, strong, tough, tough security, toughness, white background,