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Priority claimed from US08/054,329external-prioritypatent/US5288762A/en
Priority claimed from US08/054,330external-prioritypatent/US5340840A/en
Application filed by Dow Chemical CofiledCriticalDow Chemical Co
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Publication of TW324017BpublicationCriticalpatent/TW324017B/zh
Method of obtaining polymeric foamed propylene materials of low density ond closed-pore structure based on irregular extrusion at high instantaneous speed