The natural abrasive has special effect and superior performance than artificial abrasive in some field.

天然磨料有其独特的作用，在某些加工领域，天然磨料甚至具有比人造磨料更优越的性能。

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Abrasives source of their raw materials, there are two kinds of natural abrasive and artificial abrasives.

磨具按其原料来源分，有天然磨具和人造磨具两类。

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Natural or artificial abrasive powder or grain, on a base of textile material, of paper, of paperboard or of other materials, whether or not cut to shape or sewn or otherwise made up.

砂布、砂纸及以其他材料为底的类似品，不论是否裁切、缝合或用其他方法加工成形。

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