单选题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.AadvantagesBdisadvantagesCpower advantagesDpower disadvantages
单选题
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
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