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公开(公告)号：US2301696A
公开(公告)日：1942-11-10
申请号：US41434841
申请日：1941-10-09
Applicant: GRAB WALTER D
Inventor： GRAB WALTER D
IPC: E05F11/38
CPC classification number: E05F11/382 , E05Y2201/676 , E05Y2900/55
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