System test shows that the designed system can meet the need of high precision length measurement in iron and steel enterprises.
系统测试表明，所设计的系统可以满足钢铁企业对长度的高精度测量。
Introduced a method of controlling and calibrating focal length about zoom lens used in precision measurement in High-Speed TV measurement Instrument.
介绍了变焦距镜头在高速电视测量仪中用于精密测量的控制和标校方法。
Introduced a method of controlling and calibrating focal length about zoom lens used in precision measurement in High-Speed TV measurement Instrument.
介绍了变焦距镜头在高速电视测量仪中用于精密测量的控制和标校方法。
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