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公开(公告)号：US4367260A
公开(公告)日：1983-01-04
申请号：US24910781
申请日：1981-03-30
Applicant: NORRIS INDUSTRIES
Inventor： KRAUSE CHARLES J
CPC classification number: B29D99/0003 , B29C70/081 , B29C70/46 , B29K2307/00 , B29K2309/08
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