包括以下不同型号:
J50型, 10mm×0.01mm量程,50mm探距,30mm直径平砧J100型,10mm×0.01mm量程,100mm探距,30mm直径平砧J200型,10mm×0.01mm量程,200mm探距,30mm直径平砧J200/30型,30mm×0.01mm量程,200mm探距,30mm直径平砧