| 摘要 |
A combination lock which may be set to a desired combination at one side of the door on which the lock is mounted and which may be unlocked from the outside of the door by one knowing the combination. The mechanism includes a plurality of barrels each having two thimbles, one at the inside and one at the outside of the door, the outside thimbles each having a connection with its barrel to turn the same according to a preset condition accomplished by the inside thimble.
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