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公开(公告)号：US3467429A
公开(公告)日：1969-09-16
申请号：US3467429D
申请日：1967-05-08
Applicant: NORRIS INDUSTRIES
Inventor： RUSSELL FRED J , ARMSTRONG RICHARD L , JENNIE FRED L
CPC classification number: E05B3/003 , Y10T292/865
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