A lubricant often has to perform. many duties in any situation, in addition to its fundame

Lubricating oil used in a diesel engine serves to _________.

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

How often should the lubricating oil of a diesel engine be changed？A.After every tripB.Eve

A centrifugal bilge pump requires priming _____.A.primarily to lubricate the shaft sealsB.

188. Is it difficult for you to get up in the morning？ Do you sometimes oversleep？ Are you often late for work or school？ Yes？ Then Hiroyuki Sugiyama of Japan has a special bed for you. Hiroyuki’s bed

Is it difficult for you to get up in the morning? Do you sometimes oversleep? Are you often late for work or school? Yes? Then Hiroyuki Sugiyama of Japan has a special bed for you. Hiroyuki’s bed