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公开(公告)号：US3149742A
公开(公告)日：1964-09-22
申请号：US26835263
申请日：1963-03-27
Applicant: NAT RES CORP
Inventor： DUNCAN HAY ROBERT , HNILICKA JR MILO P
IPC: F17C13/00
CPC classification number: F17C13/001 , F17C2203/03 , F17C2203/0391 , F17C2203/0629 , F17C2221/012 , F17C2223/0161 , Y02E60/321 , Y10S220/901 , Y10T428/265
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