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公开(公告)号：US3151903A
公开(公告)日：1964-10-06
申请号：US12764561
申请日：1961-07-28
Applicant: GEORGE EFFNER
Inventor： GEORGE EFFNER
CPC classification number: B01J3/03 , F16J13/02 , F16J13/06 , Y10T292/223
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