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公开(公告)号：US2740501A
公开(公告)日：1956-04-03
申请号：US45159154
申请日：1954-08-23
Applicant: PAUL WRIGHT EDWARD
Inventor： PAUL WRIGHT EDWARD
IPC: B61H13/36
CPC classification number: B61H13/36 , Y10T29/49945
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