lock tube

例句：

1. 1. Thelock tube is used to secure the door.
   锁管用于固定门。
2. 2. The engineerdesigned a lock tube thatcould withstand high pressure.
   工程师设计了一个能够承受高压的锁管。
3. 3.The lock tube was crucial in securing thesafe during the robbery.
   在抢劫中，锁管对于确保安全至关重要。