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公开(公告)号：US2225210A
公开(公告)日：1940-12-17
申请号：US21747238
申请日：1938-07-05
Applicant: WATTS REGULATOR CO
Inventor： DILLON WENDELL M
IPC: G05D23/13
CPC classification number: G05D23/1346 , Y10T137/86823
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