A.< 0.25%B.0.1~0.45%C.0.25~0.5%D.0.35~0.70%
A.4~5B.1~3C.7~14D.5~7
A.0.1~0.25%B.0.25%~0.5%C.0.25%~0.6%D.0.45%~0.75%