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公开(公告)号：US2550389A
公开(公告)日：1951-04-24
申请号：US73641047
申请日：1947-03-21
Applicant: STANDARD OIL DEV CO
Inventor： SOUBY ARMAND M , SCHILLER JAMES C
IPC: C01C1/04
CPC classification number: C01C1/0411 , Y02P20/52
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