Another use of oxalic acid is in the final polishing of onyx, marble, and travertine.
另一种使用的草酸，是在最后的抛光玛瑙，大理石，和钙华。
2
Specimens prepared by polishing and etching in a weak solution of nitric acid and alcohol reveal the lamellar structure of alternating plates that forms on slow cooling.
通过打磨并在弱硝酸酒精溶液中蚀刻制备的样本显示出由缓慢冷却形成的交互层状的薄片结构。
3
Used for engraving glass, cleaning residue on the sand casting, controlled fermentation, power semiconductor wafer polishing and cleaning corrosion (with HNO3 mixed acid).