单项选择题
A.100mm B.110mm C.140mm D.180mm
A.GB/T228-2002 B.GB/T238-2002 C.GB/T238-1999 D.GB/T228-1987
A.电弧焊接头 B.锥螺纹接头 C.直螺纹接头 D.套筒挤压接头
A.越低B.越高C.不变D.二者无关
A.12mm B.14mm C.16mm D.18mm
A.100 B.150 C.200 D.300
A.一拉一弯 B.一拉两弯 C.两拉一弯 D.两拉两弯
A.9次 B.8次 C.合格 D.不合格
A.0.5 B.0.3 C.1.0 D.1.2
A.10 B.40 C.60 D.100
A.Q125 B.HRB400 C.HPB235 D.HRB335