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Guangzhou silver ring chemical engineering company

聚乙烯醇,柠檬酸,二丁酯二辛脂,过硫酸钠过硫酸铵,氟化氢铵,硝酸钠、亚硝酸钠,聚乙...

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  • Contacts：liu_yan_yi
  • Tel.:：02082562576
  • Mphone：13825196909
  • Fax：86-020-82562576
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