单项选择题
A.four-stroke B.two-stroke C.slow speed D.reversible
As for turbine oil, contacting with water in the form o...
单项选择题As for turbine oil, contacting with water in the form of steam will be inevitable so good （） properties will be essential.
A.defrosting B.de-oiling C.demulsifying D.dehumidifying
Precision engine bearing inserts are manufactured with ...
单项选择题Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or capsThe installation process of these bearings requires sufficient （）.
A.overlap B.crush C.lap or lead D.protrusion
The usual method of effectively applying foam on a fire...
单项选择题The usual method of effectively applying foam on a fire is by （）.
A.spraying directly on the base of the fire B.flowing the foam down a vertical surface C.sweeping the fire before you with the foam D.spraying directly on the surface of the fire
