When the swing or shaking direction is parallel to the dial, the influence is biggest;
当摆动或晃动方向平行于表盘时，影响是最大的；
The results show that the direction of crack propagation is parallel to the surface.
扫描照片显示裂纹扩展方向平行于表面。
The results show that the direction of crack propagation is parallel to the surface.
扫描照片显示裂纹扩展方向平行于表面。
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