无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項選擇題

In motor ship, （） is often used to recover some of the heat carried in the exhaust gases from the main engine.

A.an diesel oil heater
B.a waste heat boiler
C.a fresh water generator
D.all the above

你可能感興趣的試題

單項選擇題

Impurities from the boiler water surface can be removed through the （）.

A.safety valve
B.blow down valve
C.scum valve
D.feed check valve

單項選擇題

You should frequently compare drum-mounted and remote-reading water level indicators（） between these have contributed to failures because of overheating through shortage of water, when a boiler was being oil-fired.

A.descriptions
B.discrepancies
C.different
D.deflections

<ruby id="dgzwh"></ruby>

<ins id="dgzwh"></ins>