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公开(公告)号：US2406682A
公开(公告)日：1946-08-27
申请号：US52579644
申请日：1944-03-09
Applicant: NAT RES CORP
Inventor： HAYES NORMAN V , HUMES WILLIAM B
IPC: F26B5/06
CPC classification number: F26B5/06
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