Substantive direct dyes are used on cellulosic fibers, wool, and silk.

直接染料常用于纤维素纤维、羊毛、丝的染色。

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Substantive direct dyes are used on cellulosic fibers, wool, and silk.

直接染料常用于纤维素纤维、羊毛、丝的染色。

youdao