R347(E5515-B3-VWB)铬钼钒钨硼耐热钢焊条
R317RH(E5515-B..
R327(E5515-B2-..
R337(E5515-B2-..
R347(E5515-B3-..
R407 (E6015-B3..
R417(E5515-B2-..