The solenoid valve can be typed as a .A.thermal valveB.magnetic stop valveC.bellows valveD

If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged？

According to the passage, which of the following can NOT be typed into the same category？A

In a full flow type lube oil system, the bypass relief valve will lift due to .A.a clogged

The thermostatic valve has a throttling action, that is to say the valve can .A.stop the r

Bad valves operation of the reciprocating air compressors can be detected by observation o

It can be inferred from the passage that______.A．all Type D"s have more or less heart prob