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第一机械工业部洛阳轴承研究所研制成功Y-901型和Y-9025型两种高速圆度仪。这两种圆度仪利用半径法测量圆度,具有工作速转高,精度高,重复
The first Ministry of Machinery Industry Luoyang Bearing Institute successfully developed two Y-901 and Y-9025-type high-speed roundness meter. Both of these roundness meters use the radius method to measure the roundness, with high working speed, high precision and repetition