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公开(公告)号：US3485011A
公开(公告)日：1969-12-23
申请号：US3485011D
申请日：1966-10-21
Applicant: WILLIAM E ARCHER , EVERETT L COE JR , LEO O REED
Inventor： ARCHER WILLIAM E , COE EVERETT L JR , REED LEO O
CPC classification number: B03C3/41 , B03C2201/10
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