A new technology that the tin-nickel-copper alloy deposition can be electroplated in the citrate acid system bath was introduced.
研究了一种柠檬酸盐体系电镀锡镍铜合金新工艺。
Copper resumed a decline in London and New York. Aluminum, zinc, nickel, lead and tin also fell.
伦敦商品交易所和纽约商品交易所的铜金属价格双双下滑，锌、镍、铅、锡等金属的价格有所下降。
Ehrlich lost when copper, chrome, nickel, tin and tungsten dropped in price.
最终Ehrlich输了，铜，铬，镍，锡和钨的价格下跃。
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