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公开(公告)号:US3416729A
公开(公告)日:1968-12-17
申请号:US57201866
申请日:1966-08-12
Applicant: RICHARDS OF ROCKFORD INC
Inventor: RAVITTS RICHARD B , MECKENSTOCK JOHN W
CPC classification number: F04D13/066 , B01F3/04773 , B01F7/16 , B01F13/0049 , B05B3/082 , B05B17/08 , C02F3/16 , C02F3/165 , Y02W10/15 , Y10S261/71