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公开(公告)号：US3498372A
公开(公告)日：1970-03-03
申请号：US3498372D
申请日：1968-04-10
Applicant: NAT RES DEV
Inventor： PATTEN THOMAS DIERY , COLLINS JOHN LESLIE
CPC classification number: F28D9/0037 , F28D9/0062 , F28F3/04 , Y10S165/394
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