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In stud joint， the length ，Bm of metal end depends on material connecteD.A.Bm=1.25d or 1.5d for cast iron

In stud joint， the length ，Bm of metal end depends on material connecteD.A.Bm=1.25d or 1.5d for cast iron
B.Bm=0.5d for steel
C.Bm=d， for steel
D.Bm=2d for aluminum
正确答案：Bm=1.25d or 1.5d for cast iron；Bm=d， for steel；Bm=2d for aluminum

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