Based on comparison and practice, necessity and reliability of us - age of new self-closing gas safety valves in gas purification systems are presented.
2
打开阀净化室堵头。
Remove the cover from the valves purged box.
3
气箱通过调节阀、净化器和输液瓶相通。
The gas box through the adjusting valve and purifier is connected with the infusion bottle.
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