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公开(公告)号：US2697066A
公开(公告)日：1954-12-14
申请号：US20319950
申请日：1950-12-28
Applicant: CALIFORNIA RESEARCH CORP
Inventor： SIEG ROBERT P
IPC: B01J21/00
CPC classification number: B01J21/00 , Y10S502/507
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