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公开(公告)号：US1250050A
公开(公告)日：1917-12-11
申请号：US9695016
申请日：1916-05-11
Applicant: SIMPLEX REFINING COMPANY
Inventor： THOMPSON NELSON W
CPC classification number: F04B39/0011 , Y10T137/7911 , Y10T137/7912
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