The left femoral head has irregular contour, patchy sclerosis, and subchondral lucency, with collapse and fragmentation.
左股骨头塌陷，形态不规则，可见斑片状硬化区及软骨下透光区。
Cutting direction is an important factor for the efficiency of nc machining, esp. for that of irregular contour of free surfaces which are composed of multi-surfaces.
走刀方向对数控加工的效率有重要影响，尤其对于多曲面拼接自由曲面不规则轮廓区域的数控加工。
Cutting direction is an important factor for the efficiency of nc machining, esp. for that of irregular contour of free surfaces which are composed of multi-surfaces.
走刀方向对数控加工的效率有重要影响，尤其对于多曲面拼接自由曲面不规则轮廓区域的数控加工。
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