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公开(公告)号：US3435329A
公开(公告)日：1969-03-25
申请号：US3435329D
申请日：1966-03-15
Applicant: NAT RES DEV
Inventor： HUNTER COLIN EDWARD
CPC classification number: G05F1/445 , G05F1/455 , H02P25/10 , H02P25/145 , Y10S388/917
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