A.2.0,1.0 B.1.0,0.5 C.0.5,0.5 D.0.5,1.0
A.2 B.1.5 C.1 D.0.5
A.30B.40C.50D.60
A.手孔 B.小号人孔 C.中号人孔 D.大号人孔
A.10B.15C.20D.25