单项选择题
A.run continuously B.not start C.have high discharge pressure D.short cycle on the high pressure switch
Which of the following terms could be applied to the si...
单项选择题Which of the following terms could be applied to the simple definition the energy of motion?（）
A.Electrical energy B.Thermal energy C.Potential energy D.Kinetic energy
The delivery rate of an axial-piston hydraulic pump is ...
单项选择题The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.
A.sliding block B.pintle C.reaction ring D.tilting box or swash plate
Badly leaking refrigeration compressor discharge valves...
单项选择题Badly leaking refrigeration compressor discharge valves will cause（）.
A.overfeeding of the expansion valve B.damage to the condenser C.constant running of the compressor D.flooding of the receiver
