单项选择题
A.excessive heat B.insufficient heat C.effective cooling D.high output
Head tank should be used to remove （） from cooling wate...
单项选择题Head tank should be used to remove （） from cooling water.
A.scale B.sludge C.chemicals D.air
He said that he had turned the main engine one complete...
单项选择题He said that he had turned the main engine one complete revolution with the （）.
A.turning gear B.steering gear C.spur gear D.chain gear
Generally the gudgeon pin is fully floating in both con...
单项选择题Generally the gudgeon pin is fully floating in both connecting rod small end and （）.
A.the crosshead B.the crankshaft C.large end D.the piston bosses
