A.0.01~90mm B.0.1~90mm C.1~90mm D.10~90mm
A.0.01%~0.005% B.0.01%~0.002% C.0.01%~0.001% D.0.01%~0.0005%
A.60—80# B.80—100# C.100—120# D.120#-130#