The device used for low-pressure control and high-pressure cutout on a compressor is called a()
The efficiency and output capacity of a low pressure distilling plant will be reduced if the last effect shell ()
High exhaust back pressure will result in an increase in ()
If the head pressure of a reciprocating refrigeration compressor is excessive, ().
() are more suitable for large quantities at low pressure.
The weather is often()in a high-pressure area.
Each fire pump on a tanker must have a pressure gauge located at().
During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ()
We want such materials ______ can bear high temperature and pressure.
The circulation around a low pressure center in the Northern Hemisphere is().