2222偶氮二异丁腈供应偶氮化合物发泡剂工业级国标

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Chinan kaishan chemical company limited

Address:C6 building 22nd floor, central zhong zhi centre, chinan city, shandong province
Tel:15315576303

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15315576303

2222偶氮二异丁腈 供应偶氮化合物发泡剂工业级国标