... ortho-diaminobenzene 邻二氨基苯 ortho-formaldehyde 原甲醛 ortho-homosalicylic acid 邻甲基水杨酸 ...
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原儿茶醛二甲醚 dimethyl ether protocatechualdehyde
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探讨了利用原化学镀铜废液中的甲醛将铜还原，后酸化回收EDTA的新工艺。
Copper was reduced by formaldehyde which was contained in the effluent of chemical copper plating, and EDTA in the effluent was reclaimed after acidify.
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天然环保：原淀粉提炼精成，无甲醛。
Natural environmental: Extracted from native starch, formaldehyde-free.
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