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公开(公告)号：US3450257A
公开(公告)日：1969-06-17
申请号：US68314965
申请日：1967-11-15
Applicant: ENGLISH CLAYS LOVERING POCHIN
Inventor： CUNDY EDWIN KENNETH
CPC classification number: C04B33/06 , B03D1/002 , B03D1/008 , B03D1/06 , B03D2201/007 , B03D2201/02 , B03D2201/04 , B03D2203/04 , C04B33/10 , C04B33/30 , Y10S209/901
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