QJ 2742-1995 MJ螺纹1100MPa-235℃双头螺柱(bm=2d)... 上一篇:QJ 2743-1995 MJ螺纹1100MPa-235℃等长双头螺柱下一篇:QJ 2741-1995 MJ螺纹1100MPa-235℃双头螺柱(bm=1.5d)