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公开(公告)号：US1450808A
公开(公告)日：1923-04-03
申请号：US42337720
申请日：1920-11-11
Applicant: HUENERGARDT MFG CO
Inventor： HAROLD HUENERGARDT WILLIAM
IPC: D06F1/02
CPC classification number: D06F1/02
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