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公开(公告)号：US2657968A
公开(公告)日：1953-11-03
申请号：US13705250
申请日：1950-01-06
Applicant: MENGEL COMPANY
Inventor： SOCHNER HOWARD C
IPC: A47B88/12
CPC classification number: A47B88/483 , A47B2210/0059
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