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公开(公告)号：US2714484A
公开(公告)日：1955-08-02
申请号：US33465453
申请日：1953-02-02
Applicant: NAT RES CORP
Inventor： CARR GEORGE W , LAWRANCE RICHARD B
IPC: F04F9/00
CPC classification number: F04F9/00
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