关于实体元的局部坐标一问

请问我如何保证每个单元的xyz坐标和全局坐标平行，是不是默认就是这样呀。  
  
我在使用soild191时想用EORIENT来调整单元局部坐标方向，但没有成功，请教大家了！谢谢  
To reorient the elements (after automatic meshing) you should use EORIENT. With EORIENT, you can make SOLID191 elements match an element whose orientation is as desired, or set the orientation to be as parallel as possible to a defined axis.