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公开(公告)号：US2334981A
公开(公告)日：1943-11-23
申请号：US39187541
申请日：1941-05-05
Applicant: ACKLEY PERCY A
Inventor： ACKLEY PERCY A
IPC: E05F15/14
CPC classification number: E05F15/643 , E05Y2201/672 , E05Y2900/132 , Y10T74/18152 , Y10T74/18848
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