calculated rise of arch
... 矢跨比rise span ratio 计算矢高calculated rise of arch 桥下净空clearance of span ...
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利用机械接触式装置，通过长导轨及其光栅探头的高度变化来直接测量非球面的矢高，并把所测得的三维数据传输给计算机。
The contact mechanical equipment measures aspherical vector highness directly by a grating probe, and the three dimension data tested are transferred to a computer.
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