A.大径 B.小径 C.中径 D.底径
A.400~500 B.500~600 C.600~700 D.700~800
A.0.5%~0.6% B.0.6%~0.8% C.0.85%~1.05% D.1%~2%
A.126.20 B.126.21 C.126.22 D.126.00
A.25 B.40 C.50 D.60