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公开(公告)号：US3431938A
公开(公告)日：1969-03-11
申请号：US3431938D
申请日：1966-05-27
Applicant: DANFOSS AS
Inventor： SORENSEN CARL , MOLGARD AGE
CPC classification number: E03C1/042 , F16K11/20 , G05D23/1313 , Y10T137/6977
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