双光路方案或标准点校准方法可以消除光线路径随环境温度、湿度变化而引入的误差；
Fixed-point scaling and interpolation can eliminate the influence of optical magnification ratio varying with position variation of measuring points is obtained, 2.
双光路方案或标准点校准方法可以消除光线路径随环境温度、湿度变化而引入的误差；
Fixed-point scaling and interpolation can eliminate the influence of optical magnification ratio varying with position variation of measuring points is obtained, 2.
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