方向

The cracks first propagate in the direction dictated by the weak interface of Be and Al, then grow towards in depth. The cracks may propagate along Be basal slip plane parallel to the loading direction in the material.

裂纹主要沿Al和Be结合强度较弱的表面路径扩展，随后沿纵深方向扩展，在材料内部裂纹扩展方向会变为与加载方向平行的Be基滑移面方向。

But they are more tedious, which need to consider calculating one-way eccentric loading of the two positive shaft ( x and y directions) direction.

但是较为繁琐，需要考虑计算两个正轴（x方向和y方向）方向的单向偏心受压。

The data from dynamic simulations are used to test the directional relay, and the results confirm that the directional relay can operate correctly and reliably under various fault conditions.

用电力系统动态模拟试验的故障录波数据对该方向元件进行验证，结果表明，该方向元件能有效、可靠地判断出故障方向。