球径计 Spherometer
（重定向自Sphereometer）
球径计（Spherometer）是实验室中常用的测量仪器，用于测定一曲面之曲率半径。其原理是利用空间中四点可求一球面再配合数学公式的运算得到测量结果。
Sphereometer
中文百科
英语百科
Spherometer 球径计
（重定向自Sphereometer）
A spherometer is an instrument for the precise measurement of the radius of a sphere. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens.
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