Itiscustomaryto______thegoodsagainstrisksofcollision,leakage,pilferage,fireandstorm,etc.

In which of the following cases is nonverbal leakage less likely to happen?

Either a low injection pressure or a leakage of piston rings is able to lead （）.

Some pumps use packing as sealing gland. The gland should be( ) A: slack enough to allow slight leakage of fluid B: slightly blocked C: brought up tight so as not to allow any leakage D: fitted with a relief valve

He has a fine ______ of stamps. A: compare B: collectivity C: leakage D: collection

If the sump（）were to rise this would indicate water leakage into the oil an d an investigation into the cause must be made.

【单选题】leakage A. 补油 B. 回油 C. 泄露 D. 压油

The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong

When performing mouth-to-mouth blowing, the lips of the rescuer should cover the lips of the wounded to avoid air leakage（)

What risks belong to the general additional risks? A: TPND B: War risks C: Leakage D: Rust