back-up valve

基本解释

• [机械工程]升压阀列车后端制动阀

英汉例句

双语例句

• Furtherly, the paper also takes the back-up equipment, concept and application for the downhole-deploymemt-valve into full research.
  此外，本文还对套管阀的设备配套、理论和应用进行了较全面的分析研究。
  lib.swpu.edu.cn
• PVC flocking materials used by high-frequency hot press molding, gas valve back up, with both gas permeability and gas leak-proof function.
  用植绒PVC料经高频热压成型，倒阀门气嘴，具有双层防漏气渗气功能。
  3g.sina.com.cn

• back-up valve更多例句

专业释义

机械工程

• 升压阀
• 列车后端制动阀