The test shown: a concentration and proportion of active agent have greatly influence on effect of copper coated.

实验表明，活性剂的浓度和配比对铜的镀覆效果具有显著的影响。

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The test shown: a concentration and proportion of active agent have greatly influence on effect of copper coated.

实验表明，活性剂的浓度和配比对铜的镀覆效果具有显著的影响。

youdao