The ability of an oil to separate cleanly from an oil and water mixture is referred to as

When the bearing becomes dry from lack of oil, the motor shaft may heat to ______ an extent ______ it welds itself to the bearing.

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

The primary duty of lube oil is to reduce _____ between the working parts of an engine.A.p

In cleaning up an oil spill, the use of straw or reclaimed paper fibers would be an exampl

According to the news item, Abyei is______.A．an oil-rich regionB．a part of South KordofanC

The selection of an oil from the _____ depends to a great extent on the operating conditio