单项选择题
A.不大于0.2mm B.不大于0.3mm C.不大于0.25mm D.不大于0.28mm
A.不大于5% B.不大于10% C.不大于15% D.不大于20%
A.≯0.63 B.≯0.5 C.≯0.2 D.≯0.25