Mm and the purpose of the conversion relationships Head is the Raymond Mill Raymond Mill flour powder machine operation and machine industry, the term commonly used units, according to People's Republic of China standard GB3520-83, its conversion micron mm and relations are as follows: | mm | μm | mesh | | 1mm | 1000μm | 14 | | 0.841mm | 841μm | 20 | | 0.707mm | 707μm | 25 | | 0.595mm | 595μm | 30 | | 0.5mm | 500μm | 35 | | 0.42mm | 420μm | 40 | | 0.354mm | 354μm | 45 | | 0.297mm | 297μm | 50 | | 0.25mm | 250μm | 60 | | 0.21mm | 210μm | 70 | | 0.177mm | 177μm | 80 | | 0.147mm | 147μm | 100 | | 0.125mm | 125μm | 120 | | 0.105mm | 105μm | 140 | | 0.075mm | 75μm | 200 | | 0.068mm | 68μm | 230 | | 0.065mm | 65μm | 270 | | 0.044mm | 44μm | 325 | | 0.037mm | 37μm | 400 | | 0.02mm | 20μm | 500 |
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