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公开(公告)号：US3475677A
公开(公告)日：1969-10-28
申请号：US3475677D
申请日：1967-07-31
Applicant: CUTLER HAMMER INC
Inventor： SWINEHART MERLE R , RICHTER WALTHER
CPC classification number: G05D23/24 , G05D23/1906 , Y10S388/917 , Y10S388/933 , Y10S388/934
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