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公开(公告)号：US2032358A
公开(公告)日：1936-03-03
申请号：US69664933
申请日：1933-11-04
Applicant: STANDARD OIL CO CALIFORNIA
Inventor： FOLSOM LEON T , MAC-GREGOR JOHN R
IPC: G05D23/12
CPC classification number: G05D23/121
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