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公开(公告)号：US1609068A
公开(公告)日：1926-11-30
申请号：US75610524
申请日：1924-12-15
Applicant: WILLIAM DUBOIS
Inventor： WILLIAM DUBOIS
IPC: A61H7/00
CPC classification number: A61H7/00 , A61H2201/1692
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