nitrogen-sealed

nitrogen-sealed

美  英

  • 网络氮封

例句

Objective To study the occupational hazards characteristics in the process of big and small breathing loss on nitrogen sealed vault tank.

目的研究氮封拱顶化工储罐“大小呼吸”过程中的职业危害特征。

Improvement of Nitrogen-sealed Unit in Ultra-pure Water Treatment System

超纯水制备系统氮封装置的改进