The lengthening of a crack formed in the shell plating of a ship may be prevented by ().

A . welding brackets across both ends of the crack B . chipping out and slot welding the entire crack C . drilling a hole at each end of the crack D . cutting a square notch at each end of the crack

时间:2022-09-07 16:18:14 所属题库:船舶电气与船舶安全题库

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