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公开(公告)号：US840973A
公开(公告)日：1907-01-08
申请号：US1906319383
申请日：1906-05-29
Applicant: TODD W S GEORGE
Inventor： TODD W S GEORGE
CPC classification number: F03B11/08 , E02B1/006 , Y02E10/226
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