A.1501℃ B.1541℃ C.1521℃ D.1531℃
A.負(fù)偏析 B.正偏析 C.無偏析 D.結(jié)疤
A.0.06-0.12% B.0.09-0.15% C.0.14-0.22% D.0.17-0.25%