为了研究该机床静刚度的变化情况，计算同一水平面或竖直面内的静刚度变化率。
In order to study the variation of the stiffness, the variance ratio of the stiffness within the same horizontal or vertical plane is computed.
在同一平面内的相同粒子的干涉条纹分别在不同大小以及不同入射方向(水平或竖直)的离轴角的条件下被记录下来。
The interference patterns of the same particles in the same plane are recorded at different off-axis angles in horizontal and vertical directions.
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