他们还可以用化学方法处理合金(也许含有贵金属，也许不含)的表面，使它发出银或金的光泽，由此来伪造硬币的外表。
They could also fake the look of a coin by chemically treating the surface of an alloy (which may or may not have contained precious metals) to give it a silvery or golden sheen.
负责调查严重及复杂的商业诈骗案；电脑罪案；及印制伪钞、伪造硬币、信用卡、其他商业票据、旅游及身分证明文件的案件。
Investigates serious and complex commercial fraud; computer crime; and the counterfeiting or forgery of currency, coinage, credit CARDS, other commercial instruments and travel and identity documents.
这个硬币是伪造的。
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