What is wrong with the following statement about pressure gauge replacement is ( ).

What is wrong with the following statement about pressure gauge replacement is ( ).

When replacing the pressure gauge, it is found that the pressure gauge protection valve is not tight, the following practice is wrong ( ).

At present, most machine pump shaft seals are cooled with ( ) cooling water.

Most machine pumps today use ( ) for cooling.

Machine pump cooling water is generally selected ( ).

The action of the machine pump cooling water is ( ).

When the hot oil pump is out of service for maintenance, the end cooling water should ( ).

After the hot oil pump is out of service and standby, the end cooling water should ( ).

The following not part of the engine pump cooling water action is ( ).

The following case for the pump to cool is ( ).

After the hot oil pump is out of service, it should generally wait until the temperature of the pump body drops to ( ) purge.

Hot oil pump out of service ready for overhaul, the following statement is wrong ( ).

Hot oil pump out of service ready for overhaul, the following statement is wrong ( ).

Hot oil pump out of service ready for overhaul, the following statement is wrong ( ).