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公开(公告)号：US3208998A
公开(公告)日：1965-09-28
申请号：US7319060
申请日：1960-12-02
Applicant: STALEY MFG CO A E
Inventor： EUGENE FISHER EARL , HARPER JAMES L
CPC classification number: C08B33/04 , C08B31/125
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