供应软磁合金1J46,1J50国产进口坡莫合金圆棒 盘线
供应铁镍低膨胀合金4J36,..
供应铁镍玻封合金 4J42,..
铁镍钴玻封合金4J29、铁镍..
供应软磁合金1j33,1j3..
供应软磁合金1J46,1J5..
软磁合金1J21,1J22铁..