The Cast Iron Surface Plate can be classified as Grade 0, 1, 2, 3, 4 according to the national standard metrological verification procedures.
铸铁平台精度：按国家标准计量检定规程执行，分别为0,1,2,3级四个级别。
The Cast Iron Surface Plate can be classified as Grade 0, 1, 2, 3, 4 according to the national standard metrological verification procedures.
铸铁平台精度：按国家标准计量检定规程执行，分别为0,1,2,3级四个级别。
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