root groove造句

The result shows that the fracture has appeared fatigue feature , with initiation sites at the root grooves of the spline of the shafts
结果表明，轴的断口具有明显的疲劳特征，疲劳源位于二轴花键槽根部。
The network carbide and acicular martensites that existed in the microstructure of the root grooves of the spline due to improper carburating and quenching process of the shafts , led to the initiation and propagation of the intergranular microcracks and were the main reason that caused the early fracture of the shafts
由于渗碳淬火工艺不当，在二轴花键槽根部的组织中产生了网状破化物和粗大的针状马氏体，在外力作用下形成沿晶显微裂纹并扩展，是导致二轴疲劳断裂的主要原因。
It's difficult to find root groove in a sentence. 用root groove造句挺难的