1、什么叫磨料粒度“校正砂”? 磨料粒度“校正砂”又称“标准砂”或“标准试料”,它是以选定的原材料按照磨料标准规定的要求制造,用以校正磨料检查筛统一磨料粒度不可缺少的标准试样。目前世界主要先进工业国家都有自己的磨料粒度“校正砂”。2、为什么磨料新国标(GB2481—83)规定磨料粒度检查筛必须用“校正砂”校正后 1. What is the abrasive particle size “calibration sand”? The abrasive particle size “calibration sand” is also called “standard sand” or “standard sample material”. It is manufactured with the selected raw materials in accordance with the requirements of the abrasive standard to correct the abrasive inspection. Standard specimens that are indispensable for uniform abrasive grain size. At present, the world’s major advanced industrial countries have their own abrasive grain “correct sand.” 2. Why does the new national standard for abrasives (GB2481-83) stipulate that the abrasive grain inspection screen must be calibrated with “corrected sand”?