crystallographic direction meaning in English

结晶学方向
晶体学方向
晶向

The combination of a crystallographic plane and , within that plane , a crystallographic direction along which slip ( i . e . , dislocation motion ) occurs
滑移面和该面上一个滑移方向的组合称为一个滑移系，晶体滑移（如位错的移动）可以沿该系统发生。
Four lens microscopes are now common and it is clear , therefore , that the operator must know whether or not this inversion occurs under a particular operating condition if the plus or minus sense of a crystallographic direction is required
四透镜显微镜目前很普遍，因为很明显，操作者必须知道在特定的操作条件下，如果增加或减少一个晶体方向，这个倒置是否会出现。