| 摘要 |
A locking system comprising a housing, first and second lock cylinders each including a disk having an extension, each of the disk being rotated by a suitable key, a thrust bar having notches to receive the extensions and having a locking position for which the extensions are engaged in the notches, the thrust bar being movable when the disks are rotated simultaneously so that the extensions move out of the notches, means to maintain the extensions in the notches when the thurst bar is in its locking position, and means to urge the thrust bar to its locking position.
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