guide tube

• 导管

guide tube的用法和样例：

例句

1. Fit each valve to its respective valve guide.
   将每个阀安装到各自的阀导管。
2. An examination is carried out before the insertion of the tube.
   插入导管前先要进行检查。
3. Special guide sleeves are used to obtain greater precision in drilling.
   使用特制导向套管来保证较高的打眼精度。