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公开(公告)号：US3435954A
公开(公告)日：1969-04-01
申请号：US62192367
申请日：1967-03-08
Applicant: PASSAVANT WERKE
Inventor： OHL WERNER FRIEDRICH , PASSAVANT RUDOLF CHRISTIAN
CPC classification number: C02F3/1284 , C02F3/1257 , Y02W10/15
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