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公开(公告)号：US1909618A
公开(公告)日：1933-05-16
申请号：US41870130
申请日：1930-01-06
Applicant: ABINGDON ENGINEERING CORP
Inventor： HENDRICKSON WALTER H
IPC: A47K1/02
CPC classification number: A47K1/02 , E03C2201/90
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