求翻译：商用齿板冲击断口SEM扫描分析，200℃回火断口为韧性断裂机制，是典型的韧性断裂，400℃回火断口形貌为解理断裂特征，属解理断裂。是什么意思？

Commercial tooth plate impact fracture sem scan analysis, 200 ℃ tempering the fracture is ductile fracture mechanism, is typical of ductile fracture, 400 ° C tempering fracture morphology of the cleavage fracture characteristics, is a cleavage fracture.

Business lug sedimentological impact SEM scan analysis, 200° C tempered ductile fracture mechanisms for gaps, is typical of the fracture toughness, and 400° C tempered sedimentological features to unlock the broken features, is to break the.

The commercial toothed rack impact fracture SEM scanning analysis, 200℃ the tempering fracture for the gliding fracture mechanism, is the typical gliding fracture, 400℃ the tempering fracture appearance for the cleavage break characteristic, is the cleavage break.

Commercial impact fracture surface SEM scanning analysis of tooth plate, 200 ¡æ tempering fracture mechanism for ductile fracture, is a typical ductile fracture, 400 ℃ tempered fracture morphology for the cleavage fracture characteristic, belong to cleavage fracture.

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