The sheet of metal is moved in a helical trajectory such that the second bend comes into proximity above the first bend.
该金属 板沿螺旋形轨迹移动使得该第二弯曲进入该第一弯曲的上方邻近处。
Using the present cone beam reconstruction formula for general trajectory, we have investigated the issue of detector efficiency for non-helical trajectory.
基于现有的锥形束普适轨道的重构公式，研究了非螺旋轨道的探测器效率问题。
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