yarn dyeing with vat black
yarn dyeing with vat black
纱线用还原黑染色
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The chemical structure and production cost of vat black BBN and vat black DB are analyzed. The process conditions of yarn dyeing with these two dyes are introduced as well as the attentions in dyeing.
分析了还原黑BBN和还原黑DB的结构特点和生产成本，具体介绍了纱线染色的工艺条件，以及染色过程中需注意的事项。
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