| 摘要 |
<p>The invention is concerned with cylinder locks of the kind in which one or more tumblers provide obstruction to rotation of a barrel of the tumbler mechanism of the lock, and a key inserted into the tumbler mechanism engages with the one or more tumblers to withdraw them from providing such obstruction by initial turning of the key in one direction from its position of insertion so as thereby to enable further turning of the key in that same direction to effect unlocking.</p> |
