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公开(公告)号：US3555243A
公开(公告)日：1971-01-12
申请号：US3555243D
申请日：1966-09-22
Applicant: RATIO CONTROLS CORP
Inventor： ROMAN TERRANCE S
Abstract: A novel, solid state heating circuit is provided to maintain the photosensitive cell. At a predetermined temperature such that the instrument response is essentially independent of ambient temperature.
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