| 摘要 |
A structure is provided to prevent access to the latch pin of a dead bolt or latch lock. For dead bolts, a sleeve is provided which is received over the bolt frame in which the latch pin reciprocates. The sleeve is secured to the frame in such a manner that the latch pin cannot be accessed without removing the sleeve. For latch locks, a sleeve is provided with an extending tongue, which tongue covers the ears of the latch pin and denies access to the ears.
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