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"