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公开(公告)号：US3519283A
公开(公告)日：1970-07-07
申请号：US3519283D
申请日：1966-03-18
Applicant: INTERPACE CORP
Inventor： TASHLICK IRVING , BERLINGER ISMAR
CPC classification number: F16L21/05 , Y10S277/944
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