The experimental result also shows that the nitrogen element on the surface of contact black surface may be mainly in forms of amino group and nitro group.

此外，实验分析了接触法炭黑表面氮元素的组成，结果表明主要是以氨基和硝基的形式存在。

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The experimental result also shows that the nitrogen element on the surface of contact black surface may be mainly in forms of amino group and nitro group.

此外，实验分析了接触法炭黑表面氮元素的组成，结果表明主要是以氨基和硝基的形式存在。

youdao