A.15mm B.20mm C.25mm D.30mm
A.60~80% B.70~80% C.75~80% D.50~80%
A.21 B.15 C.22 D.10
A.80mm,6mm B.60mm,6mm C.80mm,8mm D.60mm,8mm
A.1 B.2 C.3 D.4