铜及铜合金线在生产、贮存、运输过程中极易发生氧化及变色。

Copper and copper alloy wires are easily to be oxidized and discoloured during production, transportation and storage.

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铜及铜合金线在生产、贮存、运输过程中极易发生氧化及变色。

Copper and copper alloy wires are easily to be oxidized and discoloured during production, transportation and storage.

youdao