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公开(公告)号：US3121315A
公开(公告)日：1964-02-18
申请号：US15401561
申请日：1961-11-21
Applicant: CONTROLS CO OF AMERICA
Inventor： ARTHUR MATHIES ALAN
CPC classification number: G05D23/1921 , F24F11/30 , F25B41/043
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