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公开(公告)号：US2999274A
公开(公告)日：1961-09-12
申请号：US72821458
申请日：1958-04-14
Applicant: PHILLIPS PETROLEUM CO
Inventor： SILAS CECIL J , SCOTT JR JOHN N
IPC: B29C45/58
CPC classification number: B29C45/581
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