The causes of tarnishing gold and silver - plated connectors were studied respectively.

分別探討了接插件鍍金和鍍銀層變色的原因.

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Bright tin electrodeposits on copper wire are susceptible to tarnishing.

銅線材經(jīng)光亮鍍錫后易產(chǎn)生腐蝕變色.

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Do they not realize their foolhardiness and which they are tarnishing the Republic's image?

他們難道不知道自己的行為不但愚蠢,也會損害新加坡的形象?

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The anti - tarnishing experiments can be taken to confirm a certain alloy's anti - tarnishing capability.

銀合金的特點是容易發(fā)生硫化變色,通過 抗 變色試驗可以確定合金的 抗 變色性能.

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