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.<br>A:rotary；reciprocating<br>B:up and down；fore and aft<br>C:fore and aft；up and down<br>D:up and down；rotary

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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