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1.发明授权Device for measuring relative displacement between plural light sources and a scale utilizing frequency multiplexing 失效用于测量一次光源之间的相对位移和利用频率多路复用的尺度的装置
公开(公告)号：US3551682A
公开(公告)日：1970-12-29
申请号：US3551682D
申请日：1969-04-18
Applicant: COMPTEURS COMP D
CPC classification number: G01D5/363
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