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公开(公告)号：US2714458A
公开(公告)日：1955-08-02
申请号：US27876252
申请日：1952-03-27
Applicant: CROFTS ENGINEERS LTD
Inventor： ARTHUR CROFT , WILLIAM HAMMOND DOUGLAS , JAMES GOFF MAURICE THOMAS
IPC: B65G25/00
CPC classification number: B65G25/02
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