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公开(公告)号：US1959094A
公开(公告)日：1934-05-15
申请号：US53168231
申请日：1931-04-21
Applicant: SMITH DRUM & COMPANY
Inventor： DURM GEORGE E , JAXHEIMER WILLIAM H
IPC: D06B5/20
CPC classification number: D06B5/20
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