反之，也可根据对某一直径钢球的淬硬层深度的要求，选择具有适当淬透性的钢种。
Conversely, according to the demand of hardening depth of a certain diameter of steel sphere, a steel kind of suitable hardenability can be selected.
反之，也可根据对某一直径钢球的淬硬层深度的要求，选择具有适当淬透性的钢种。
Conversely, according to the demand of hardening depth of a certain diameter of steel sphere, a steel kind of suitable hardenability can be selected.
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