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。

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By analyzing the forming condition of D-type graphite cast iron, the paper describes the influence of trace alloy elements on the structure and property of D-type graphite cast iron.

通过对D型石墨铸铁认识过程和形成条件的分析，阐述了微量合金元素对D型石墨铸铁的组织和性能的影响，对于提高铸铁的性能具有一定的指导价值。

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In accordance with the conventional production process, the loss of lithium is often about 7%, when Al-Li alloy is melted in graphite crucible.

根据生产经验，用石墨坩埚熔炼铝锂合金，锂的损失一般稳一在7%左右。

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