单项选择题
A.圆周满焊 B.点焊固 C.焊固 D.点焊,大于1/3周
A.1mm B.2mm C.2.5mm D.3mm
A.0.5mm B.0.75mm C.1mm D.1.5mm
A.0.2 B.0.3 C.0.5 D.0.8
微信扫一扫,加关注免费搜题