标准型号SPC输出型号测量范围 分辩率 精度293-240 293-230 0-25mm 0.001mm ±1um293-241 293-231 25-50mm 0.001mm ±1um293-242 293-232 50-75mm 0.001mm ±1um293-243 293-233 75-100mm 0.001mm ±2um 293-250 100-125mm 0.001mm ±2um 293-251 125-150mm 0.001mm ±2um 293-252 150-175mm 0.001mm ±3um 293-253 175-200mm 0.001mm ±3um 293-254 200-225mm 0.001mm ±3um 293-255 225-250mm 0.001mm ±4um 293-256 250-275mm 0.001mm ±4um 293-257 275-300mm 0.001mm ±4um