Although the crankshafts of medium diesel engines appear to be robust they rely on the su
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Although the crankshafts of medium diesel engines appear to be robust, they rely on the support of _____ to develop their full strength.
A.the piston rods
B.the crank throws
C.the thrust bearings
D.the main bearings
请帮忙给出正确答案和分析,谢谢!
