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公开(公告)号：US2640671A
公开(公告)日：1953-06-02
申请号：US11476049
申请日：1949-09-09
Applicant: GRADY MARTIN J
Inventor： GRADY MARTIN J
IPC: A47K10/10
CPC classification number: A47K10/10 , A47K2201/02 , Y10T403/39
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