单项选择题

（） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.

A.A relief valve
B.An alarm
C.A pressure gauge
D.A non-maim valve

<上一题 目录 下一题>
热门 试题

单项选择题
（） allows for expansion and water make up in the water cooling system.

A.A top tank
B.A head tank
C.A head valve
D.A drain tank
单项选择题
（） rods are not in proper condition so that too much fuel is supplied to the corresponding cylinder.

A.Piston
B.Sounding
C.Regulating
D.Connecting
相关试题