不定项选择
A.0.1,0.4 B.0.1,0.2 C.03,0.6 D.0.4,0.6
A.对接焊缝 B.各种角焊缝 C.人孔 D.锻制加强圈的外接焊缝
A.100~200 B.200~300 C.300~350 D.400~500