A.1/50~1/60 B.1/50~1/70 C.1/60~1/70 D.1/60~1/80 E.1/70~1/80
A.0.6 B.0.7 C.0.75 D.0.8 E.0.9
A.21°~22° B.20°~22° C.21°~23° D.20°~24° E.21°~24°