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Protein macromolecule dyes with good colour intensity, fastness and compatibility - are obtained by reacting natural protein, e.g. casein, gelatin or skin protein, with dye reacting with amino groups, e.g. azo, azo metal complex or anthraquinone dye, use 专利
申请日期: 1999-01-01, 公开日期: 1999-02-11
作者:  YANG J ZHANG S
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Composite electromagnetic inductor for electromagnetic casting - has insulating material between composite magnetic conducting coils. 专利
申请日期: 1999-01-01, 公开日期: 1999-02-17
作者:  ZHANG X JIN J SUN Z
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