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公开(公告)号：US2747549A
公开(公告)日：1956-05-29
申请号：US27829252
申请日：1952-03-24
Applicant: MENASCO MFG COMPANY
Inventor： GERRY JULIAN E , MCMANNUS HOWARD G
CPC classification number: B64C25/505 , F15B21/10
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