Pipes carry oil across the desert to the east.

输油管把石油经过沙漠运送到东部。

The basic theory and process for machining marks (code) on the outer wall of pipe with electrolyse-jet are introduced.

介绍了采用电解一射流加工法在油管外壁表面加工标记（号）的基本原过程，通过实总结出了较的工艺规范。

The mainly rubber productions: various rubber special type productions, high pressure tube, rubber airproof strip and tube, resinic tube and so on.

各种橡胶异型件、高压油管、橡胶密封条、管、树脂管等。