These are graphite, high silicon cast iron, lead silver alloy, platinum, and even scrap steel rails.
所用材料有石墨、高硅铸铁、铅银合金、铂、甚至废钢轨等。
2
The results show that the factors arragned in important order as the follows:the quantity of iron scrap, graphite, ancillary material A, treatment time, aeration time.