The tendency for lubricating oil to thin out at high temperatures and thicken at low tempe

In engines with system, the lubricating oil can be added to the engine through the filling

For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a／an _

The ______pump is usually used as the lubricating oil pump.A.turbineB.screwC.vaneejectorD.

The term "pour point" is defined as the lowest temperature at which lubricating oils will

Sludge may form. in the lubricating oil crankcase of a reciprocating air conditioning comp

（)provides strength and storage space for fuel，lubricating oil，fresh water，salt（ballast)wa