找考题网-背景图
单项选择题

A.划线→钻孔→锯割→锉削→攻丝B.划线→锯割→锉削→钻孔→攻丝C.划线→锉削→钻孔→攻丝→锯割D.划线→钻孔……

将一块大小合适的矩形钢加工成如图所示的零件,以下加工步骤合理的是()



A.划线→钻孔→锯割→锉削→攻丝
B.划线→锯割→锉削→钻孔→攻丝
C.划线→锉削→钻孔→攻丝→锯割
D.划线→钻孔→攻丝→锉削→锯割