以下为句子列表：
英文: Letter of Declaration that all goods are azo dyes free, low cadmium and plastics parts are phthalate free signed by the supplier on their company's letterhead.
中文: 公司声明在供应尚信签的抬头上显示所有的货物不含氮的染料,不含低镉及塑料部分不含酞酸盐.
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英文: The technique of designing nonmutagenic azo dyes is put forward on the basis of the structuremutagenicity relationship found by analyzing and inducing the mutagenic or carcinogenic results of azo dyes.
中文: 摘要对大量偶氮染料诱变（或致癌）活性的研究结果进行分析、归纳和总结，从中找出它们的诱变性与其结构的内在关系。据此，提出非诱变偶氮染料的设计方法。
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