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公开(公告)号：US1440042A
公开(公告)日：1922-12-26
申请号：US48013721
申请日：1921-06-24
Applicant: BESSELL WHALLEY EDMUND
Inventor： BESSELL WHALLEY EDMUND
IPC: B27L1/05
CPC classification number: B27L1/05
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