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公开(公告)号：US2644800A
公开(公告)日：1953-07-07
申请号：US9648649
申请日：1949-06-01
Applicant: STANDARD OIL DEV CO
Inventor： MOTTERN HENRY O , PHILO WESLEY N
IPC: B01J35/02
CPC classification number: B01J35/026
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