Method for black coloring of brass and tin was investigated. The optimal formulation and technological process for chemical black coloring of brass and tin surfaces present together were chosen out.
探讨了黄铜和锡表面着黑色膜的 化学着色方法，筛选出黄铜和锡共同着黑色的最佳配方，实现了黄铜、锡共同着黑色的工艺流程。
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