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。
The precious metal is selected from silver, gold, platinum and the alloy thereof.
贵金属选自银、黄金、铂金、及其合金。
The composition, structure, properties and application of the gold—silver—palladium—platinum—copper alloy system were described.
介绍了金银钯铂铜合金系列的成分、组织、性能及其应用研究。
The composition, structure, properties and application of the gold—silver—palladium—platinum—copper alloy system were described.
介绍了金银钯铂铜合金系列的成分、组织、性能及其应用研究。
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