单项选择题
The connecting rob is fitted between the crosshead and the crankshaftIt transmits the firing force, and together with the crankshaft convert the （） motion to a （） motion.
A.rotary；reciprocating
B.up and down；fore and aft
C.fore and aft；up and down
D.up and down；rotary
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相关考题
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单项选择题
The （） of the semi-built method of the construction crankshaft is that by making the two webs and crankpin from a single forging the grain flow in the steel follows the web round into the crankpin and back down the other web.
A.advantages
B.disadvantages
C.power advantages
D.power disadvantages -
单项选择题
Today, crankshafts for large 2-stroke crosshead engines are of the （）type.
A.semi-built
B.built-up
C.solid forged
D.individual forged -
单项选择题
The crankpins and journals were machined and matching holes bored in the webs, which were slightly （） in diameter.
A.smaller
B.larger
C.higher
D.lower
