【简答题】pressure / ˈ preʃə(r)/ n.
【单选题】The evaporating pressure in R22 vapor compression refrigeration plant should be _____ atmospheric.
【单选题】There is considerable pressure on agers to ______.
【单选题】Which will cause the high pressure cutout to stop the compressor in a R-22 system?
B.
A shortage of liquid refrigerant
C.
Excessive frost on the evaporator
D.
Not enough condenser cooling water
【简答题】pressure [ˈpreʃə(r)]
【单选题】通过 PSL 控制屏蔽门开关动作的方式属于()。
【单选题】下列矿物中具有(三组完全)菱面体解理的是:( )。