Qingdao sainuo ndi kampani zoweta chinkhoswe mu r & D ndi kupanga polyethylene sera, Special kusinthidwa sera, EBS, Stearate ndi mafuta mafuta ndi kubalalitsa mankhwala.Chiyambireni kukhazikitsidwa kwa kampaniyo zaka zoposa 10, wakhala akudzipereka pa chitukuko cha kupanga technol ...
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