They contain one or more functional group such as amide, hydroxy, or carboxy.
它们含有一个或多个功能团如：氨基、羟基、羧基。
Preparation of hydroxy-aluminum trichloride and modified polyacrylic amide was discussed. Together with a natural material, high-efficiency water treatment coagulant was made.
研究了羟基氯化铝和改性聚丙烯酰胺的制法，然后与一种天然物质复配，制成了一种复合水处理混凝剂。
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