黄色片网站-成人片黄网站色大片免费观看app-国产伦精品免编号公布-欧洲处破女www人鲁-韩国日本三级在线观看

Stop valve for rod ammonia

Dateline:2014-11-30    Hits:

Ammonia valve often use the oxygen, nitrogen, hydrogen, argon and other gases.These gases are generally stored in a dedicated high-pressure gas in. Through the use of ammonia valve to make the gas pressure required to experimental range, and then fine-tuning through the other control valves, so that the use of gas input system.The most commonly used valve for ammonia valve, referred to as ammonia valve.

手機網站