测径规校正器操作方便,高精度.亦可校正一般量表，适用范围：0-250mm,测径规校正器品质可靠，欢迎选购 This is a calibration tester used exclusively for cylinder gauges having a high precision micrometer with the minimum scale of 1 µ m. An outer cylinder is held erectly so that deflection may not affect the measurements and a center rod for pressing is provided on the moving bed in order to prevent from errors due to the difference of measuring force