lengthening pipe

例句：

1. 1. The lengthening pipe is essential for the operation of the machine.
   拉长管是机器运行所必需的。
2. 2.The engineer used a lengthening pipe to make the wall thinner.
   工程师使用拉长管使墙壁变薄。
3. 3.The lengthening pipe was installed in the factory to transport materials.
   拉长管被安装在工厂中，用于运输材料。