double-welded lap joint 双面焊搭接接头

double fillet welded joint 双面焊缝接口 ; 双面填角焊接头

double fillet welded T-joint 双面丁字形焊接

double welded butt joint 双面对焊接

double welded lap joint 双面搭焊接 ; 双面对焊接

double fillet welded lap joint 双面对焊接

double fillet welded t joint 双面丁字形焊接

double-welded butt joint 双面焊对接接头