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公开(公告)号：US2666462A
公开(公告)日：1954-01-19
申请号：US28692052
申请日：1952-05-09
Applicant: RICHARDSON DOW C
Inventor： RICHARDSON DOW C
CPC classification number: B27B31/02 , B65G47/29 , B65G2201/0282
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