Fuel oil is thought to be one of the main factors _____ the operation and maintenance of a

The selection of an oil depends _____ on the operating conditions, the design of the engine and the type of fuel to be burned.

One of the main functions of lube.oil is to remove （) from oil cooled pistonsA.powerB.fri

One way for people to cut back on oil use is to switch to other types of fuel. Because woo

When centrifuging heavy fuel oil, an important factor to consider is the _____（1) flow rat

A centrifugal fuel oil purifier should be shut down if ________.A.more sealing water is ne

A healthy life is frequently thought to be co