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公开(公告)号：US3498645A
公开(公告)日：1970-03-03
申请号：US3498645D
申请日：1968-07-12
Applicant: INTERPACE CORP
Inventor： KOWALEWSKI CASIMIR K , DANKO NICHOLAS S
CPC classification number: F16L25/0027 , F16L27/12 , Y10T403/32
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