A.To protect her from getting scratches.B.To help relieve her of the pain.
A. To protect her from getting scratches.
B. To help relieve her of the pain.
C. To prevent mosquito bites.
D. To avoid getting sunburnt.
为了满足互换性要求,设计时规定的公差值越小越好。( )
用普通计量器具测量孔轴尺寸时,根据具体情况可以选择______、______和______验收极限。
图样中给出的零件尺寸的基本偏差绝对值愈大,则公差等级愈低。( )