机械式自设密码锁
1.锁和把手一体成形设计.
2.四位垂直密码可由客户自行设计设定.
3.无须使用钥匙，机械操作，不会损坏.
4.不用电源，无须地限制，实用于任何场所.
5.附管理者钥匙功能，用于紧急开门和换锁。

mechanical keyless lock
1.all-in-one lock.
2.four vertical passwords can be set by customer themselves.
3.keyless,mechanical operation,non damaged.
4.no worries. no power, no space restriction, applicable to any place.
5.master key for emergency unlocking and changing.