A.Ra12.5~6.3 B.Ra3.2~1.6 C.Ra12.5~2.5 D.任意
A.IT7—IT9 B.IT9—IT10 C.IT10—IT10 D.IT11—IT12
A.Ra25-12.5 B.Ra6.3-1.4 C.Ra3.2-0.4 D.Ra12.5-6.3