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公开(公告)号：US2754261A
公开(公告)日：1956-07-10
申请号：US28063152
申请日：1952-04-04
Applicant: PERMUTIT CO LTD , STEWARTS & LLOYDS LTD , WOODALL DUCKHAM VERTICAL RETOR , OVEN CONSTRUCTION COMPANY 1920
Inventor： INGHAM AKEROYD EWART
IPC: B01J49/00
CPC classification number: B01J49/05
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