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公开(公告)号：US3271939A
公开(公告)日：1966-09-13
申请号：US33168163
申请日：1963-12-19
Applicant: UNION CARBIDE CORP
Inventor： GRANGER JR FRED L , POTTER NORMAN M , SMITH ALAN D
IPC: A01D34/47
CPC classification number: A01D34/475 , A01D2101/00
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