Two important facts, crystal shape and magnetic inclusions, which affect toughness index were expounded. Especially, magnetic inclusions affect thermal toughness index more than tough ness index.

阐述了影响金刚石冲击强度的两个重要因素：晶型与磁性包裹体，特别是磁性包裹体对热冲击强度的影响比对常温冲击强度的影响更甚。

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