A.1:15~20B.1:12~15C.1:10~12D.1:8~10E.1:4~6
A.98%以上B.95%以上C.90%以上D.88%以上E.85%以上
A.0.29~0.31mmB.0.31~0.33mmC.0.33~0.35mmD.0.35~0.37mmE.0.37~0.39mm