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公开(公告)号：US1990913A
公开(公告)日：1935-02-12
申请号：US63876032
申请日：1932-10-20
Applicant: MALCOLM MCGREGOR JOHN ERNEST
Inventor： MALCOLM MCGREGOR JOHN ERNEST
IPC: B65G51/02
CPC classification number: B65G51/02
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