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公开(公告)号：US2528099A
公开(公告)日：1950-10-31
申请号：US9844849
申请日：1949-06-11
Applicant: DORR CO
Inventor： WILCOX ARNOLD L , ROBERTS ELLIOTT J , FITCH ELLIOTT B
IPC: B01J47/10
CPC classification number: B01J47/10
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