At installation, insufficient compression of the sealing pad behind the carbonring seal of the expander results in oil entrance to expander body and to the corresponding pipeline.
由于膨胀机碳环密封后面的密封垫片在安装时未被充分压紧,使膨胀机机体及相应管道进油。
2
This paper reviews the catalyst system in RCM reaction and RCM application in the synthesis of natural products including carbonring, oxygen heterocycles and nitrogen heterocycles, etc.