探尺 meaning in English

stock rod; trial rod

First , the wheelset is fixed and rotated by the device used hi vehicle depot as usual . second , the center line of wheelset axis is determined by a device called axis - center probe . last , the acting device for sensor can draw a whole felloe profile , which is made up of parallel - pole device and rotating - probe
鉴于此，本文给出了一种全新的测量方案：采用车辆段普遍使用的转轮器实现被测轮对的定位；采用车轴基准探尺测定被测轮对的轴线；采用并联式伸缩机构和旋转测头作为传感器的执行机构，测定轮辋断面的轮廓线。