特点:? 用于内径千分尺、Holtest和内径表的快速调零? 每个校正环规上都标有实际内径? 也可使用陶瓷制校正环规。正常使用情况下，只需对陶瓷进行简单的维护和保存，而无需更多的防腐处理性能参数公制型英制型尺寸 货号 精度 尺寸 货号 精度6mm 177-267 1.5um .24 177-207 .00006 6.5mm 177-271 1.5um .275 177-281 .00006 7mm 177-275 1.5um .35 177-179 .00006 8mm 177-125 1.5um .425 177-293 .00006 10mm 177-126 1.5um .50 177-180 .00006 12mm 177-284 1.5um .60 177-181 .00006 14mm 177-132 1.5um .65 177-182 .00006 16mm 177-177 1.5um .70 177-183 .00006 17mm 177-133 1.5um .80 177-287 .00006 20mm 177-286 1.5um 1.0 177-184 .00006 25mm 177-139 1.5um 1.2 177-289 .00006 30mm 177-288 1.5um 1.4 177-185 .00006 35mm 177-140 1.5um 1.6 177-291 .00006 40mm 177-290 1.5um 1.8 177-186 .00006 45mm 177-178 1.5um 2.0 177-187 .00006 50mm 177-146 1.5um 2.4 177-293 .00006 60mm 177-292 1.5um 2.5 177-315 .00006 62mm 177-314 1.5um 2.8 177-188 .00006 70mm 177-147 1.5um 3.0 177-317 .00006 75mm 177-136 1.5um 3.2 177-295 .00006 80mm 177-294 1.5um 3.5 177-319 .00006 87mm 177-318 1.5um 3.6 177-189 .00006 90mm 177-148 1.5um 4.0 177-297 .00006 100mm 177-296 1.5um 5.0 177-299 .00010 125mm 177-298 2.5um 6.0 177-301 .00010 150mm 177-300 2.5um 7.0 177-303 .00010 175mm 177-302 2.5um 8.0 177-305 .00010 200mm 177-304 2.5um 9.0 177-307 .00010 225mm 177-306 2.5um 10.0 177-309 .00010 250mm 177-308 2.5um 11.0 177-311 .00010 275mm 177-310 2.5um 12.0 177-313 .00010