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公开(公告)号：US1998415A
公开(公告)日：1935-04-16
申请号：US67984033
申请日：1933-07-11
Applicant: ROBERT BOOTH & COMPANY
Inventor： ROBERT BOOTH
CPC classification number: B60S1/68 , B60B11/06 , Y10S152/01
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