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公开(公告)号：US2870082A
公开(公告)日：1959-01-20
申请号：US47281854
申请日：1954-12-03
Applicant: CALIFORNIA RESEARCH CORP
Inventor： SIEG ROBERT P , BARBER GEORGE R
IPC: B01J21/12
CPC classification number: B01J21/12
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