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公开(公告)号：US2436769A
公开(公告)日：1948-02-24
申请号：US65503646
申请日：1946-03-18
Applicant: ROBERT MITCHELL COMPANY LTD
Inventor： HARDIE JAMES H
IPC: E05C1/14
CPC classification number: E05C1/14 , Y10T292/0976
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