In one case, executives discovered a coating advertised as pure gold that masked a complex alloy, which included rare metals such as osmium, iridium, ruthenium and rhodium.
在一个案例中，业内高管发现一种号称纯金的涂层其实是一种复杂的合金，含有锇、铱、钌、铑等稀有金属。
In one case, executives discovered a coating advertised as pure gold that masked a complex alloy, which included rare metals such as osmium, iridium, ruthenium and rhodium.
在一个案例中，业内高管发现一种号称纯金的涂层其实是一种复杂的合金，含有锇、铱、钌、铑等稀有金属。
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