车削薄壁零件须解决的首要问题是减少零件的变形,特别是()所造成的变形。
A. 切削垫
B. 振动
C. 切削力
D. 夹紧力和切削力
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Thank you for your kind attention to this ______.
A. watch
B. duty
C. affair
D. cargo
We regret that in view of the above,we are not in a position to ______ liability for the shortage.
A. Consume
B. Perfume
C. Assume
D. Confuse