Before operation, special consideration must be given to pressure limitations, system containment, purging requirements, etc., to determine if additional safety measures are required.
在操作前，必须对压力极限、系统容积、净化要求等专门考虑，以决定是否要求额外的安全措施。
2
So we design purging equipment with PLC, which can finish the blowing behavior automatically on the pressure line of the air flow measuring system.
针对此情况，设计了在测风装置上加装带PLC的吹扫装置，可以实现风量测量系统取压管的自动吹扫。
3
Conclusion: TCM drugs for purging the lung and removing phlegm and blood stasis could decrease pulmonary artery pressure and might prevent pulmonary vessel from reconstitution.