包含 trivalent 的英语例句 | 欧路词典例句词典

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At present, trivalent chromium electroplating process has became one of the mostimportant techniques to taking place of the seriously pollutional hexvalent chromiumelectroplating process.

目，铬电镀工艺已经成为代污染六铬电镀要技术之一。

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When the metal coating is punctured or scratched, the capsules in the damaged area burst and ooze restorative liquids, in the form of compounds called trivalent chromates.

当金属的覆盖层受到扎损时，受损域的胶囊裂并渗出具有恢复性的液体---三价铬钝化化合物。