单项选择题
The crankshaft is of the semi-built type, with the （） being shrunk into the forged or cast steel crank throws.
A.journal B.crank-pin C.main bearing D.large end of connecting rod
单项选择题 The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.
单项选择题 The crankshaft deflection is at first to be （） before and after repair.
