A.0.1~0.3μm B.0.12~3.12μm C.0.5~8.0μm D.0.2~2.0μm
A.0.1% B.1% C.0.5% D.0.01%
A.凹坑小 B.两者大小相当 C.凹坑大 D.与凹坑厚处的雹直径一致