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The formation of acidic groups was examined by IR spectra.
形成酸性组审查了红外光谱.
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Solution of saturated polyester with acidic groups.
饱和酸性基酯类的共聚物溶液.
Solution of a copolymer with acidic groups.
含酸性基酯醚类的共聚物溶液.
[总]酸性基???煤中呈酸性的含氧官能团的总称。主要为羧基和酚羟基。???
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