A.0.5%B.1%C.1.5%D.2%
A.4B.8C.12D.16
A.三級(jí)焊縫不允許有未焊滿B.二級(jí)焊縫不允許有咬邊C.三級(jí)焊縫不允許有電弧擦傷D.一級(jí)焊縫不允許有咬邊