125mm标准试验指

This test probe similar to that of test probe B of IEC 61032 but having a circular stop face with a diameter of 125 mm instead of the non-circular face, the distance between the tip of the test finger and the stop face being 100 mm.
 
试验时采用类似IEC61032中B型试验棒，但是用直径为125mm的圆挡板取代非圆形挡板，从试验指尖端到挡板距离为100mm。