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公开(公告)号：US3503233A
公开(公告)日：1970-03-31
申请号：US3503233D
申请日：1968-06-05
Applicant: NORRIS INDUSTRIES
Inventor： RUSSELL FRED J , ARMSTRONG RICHARD L , RODRIGUEZ HUMBERTO A
IPC: E05B9/08
CPC classification number: E05B9/084 , Y10T70/7655 , Y10T70/8541
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