The travelling range of working stage | 76mm×50mm/scale value of the vernier 0.1mm | 76mm×50mm/scale value of the vernier:0.1mm | 76mm×50mm/scale value of the vernier:0.1mm | 76mm/50mm/scale value of the vernier 0.1mm | 76mm×25mm/scale value of the vernier 0.1mm |