可打开起重机驾驶室锁闭门的钥匙。为了安全起见，非相关人员禁止出入。
A key that unlocks the crane control room. Only authorized personnels are allowed to enter for safety reasons.
可打开起重机驾驶室锁闭门的钥匙。为了安全起见，非相关人员禁止出入。
A key that unlocks the crane control room. Only authorized personnels are allowed to enter for safety reasons.