two way lock

例句：

1. 1. The hotel provides atwo-way lock system to ensure thesafety of guests.
   酒店提供双向锁系统以确保客人的安全。
2. 2. The security guard installed a two-way lock on the door to preventunauthorized access.
   保安在门上安装了双向锁以防止未经授权的进入。
3. 3. Thetwo-way lock is designed to providean extra layer of security for the building.
   双向锁的设计是为了为大楼提供额外的安全层。