| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase in cost by reducing abrasive grains which are discarded without directly contributing to finishing. SOLUTION: The content of abrasive grains contained in a fixed abrasive board is distributed in such a way that the abrasive grains are uniformly dispersed and distributed in conventional way in a region mainly contributing to the finishing and on the other hand, the inside and outside of the fixed abrasive board which do not contribute to the finishing have the constitution containing no abrasive grain. By distributing the density of abrasive grains in this way, the efficiency of utilization of the abrasive grains is improved and the cost can be reduced.
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