Before an abrasive wheel is mounted, it should be inspected closely to be sure that it is free from cracks or defects.

安装砂轮之前，应该仔细检查砂轮，以确保没有裂纹或缺陷。

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Before an abrasive wheel is mounted, it should be inspected closely to be sure that it is free from cracks or defects.

安装砂轮之前，应该仔细检查砂轮，以确保没有裂纹或缺陷。

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