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.
在对回转支承进行受力分析、强度校核的基础上，对原设计作了几点改进，如加大钢球直径、增加高度、选用高级合金钢材料等。
Based on the force analysis and strength check on the gyroscopic support, the original design has been improved, such as enlarging the diameter of steel material.
介绍几个关于金属材料硬度仪器的研制，仪器主要是依靠不同角度的角锥金刚石压头或者不同直径的钢球压头依靠加卸载力来对金属表面做出压痕。
On a few metal hardness instruments, major equipment is on a different angle conical diamond indenter or different diameter ball pressure on the first loading of the metal to Surface make indentation.
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