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Night Latch Function, 夜功能锁体
文章附图

Lockcase:  1  latch  bolt  plus1 guard latch, no deadbolt. 单斜舌加一个防撬
舌。没有方舌。
Outside trim: Dummy handle or no handle, single cylinder.外部假把手或没有把
手, 单边锁芯。
Inside  trim:  Lever  handle  only, no cylinder, no turn.内部仅有执手,没锁
芯,没旋钮。
Lock  and  unlock:  Door can be unlocked with key. Once the door is closed,
the latch bolt is locked by the guard latch. 钥匙开门,门一旦关上,防撬舌锁
住斜舌。
Get in: First turn with key withdraws the latch bolt and door can be opened
then.开门时,旋转钥匙收回斜舌,然后开门。
Exit:  One can leave by turning the inside lever.  出门时,转动执手然后可以
出门。

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