单项选择题
A.power output B.friction and wear C.indicated pressure D.rated horsepower
The pressurized air is usually cooled to increase the c...
单项选择题The pressurized air is usually cooled to increase the charge air （）.
A.viscosity B.density C.velocity D.electricity
The pressure of pilot air is usually （） than that of st...
单项选择题The pressure of pilot air is usually （） than that of starting air.
A.higher B.lower C.low D.high
The power generated in the turbine must （） that require...
单项选择题The power generated in the turbine must （） that required by the compressor.
A.be less than B.be larger than C.be as large as D.not be so large as
