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有効 (3年, 10か月前)ジャニラブポイント： 6
Mechanical locks are the backbone of your security system. There are three types of tumbler locks: pin-tumbler, disk-tumbler, and lever-tumbler. Pin-tumbler locks are the most common. The tumblers in this type of lock are small pins. The modern door lock is a compact pin-tumbler cylinder lock of the type developed (1860) by the American inventor […] 表示