日产日韩亚洲欧美综合,精品国产青草久久久久福利,精品一区二区AV天堂,又大又粗又猛免费视频

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(jī)網(wǎng)站