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公开(公告)号：US3263832A
公开(公告)日：1966-08-02
申请号：US36089264
申请日：1964-04-20
Applicant: FMC CORP
Inventor： WILLIAMS JR ELWYN O , INGHRAM DONALD M
CPC classification number: B65G63/025 , B64F1/32 , B65G63/004
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