在正常计量范围内利用单波长数据获得精度较高的计量值，达到扩大传感器测量范围的目的。
The metering data, which is more accurate than the data from the dual wavelength. can be acquired by a single wavelength.
在正常计量范围内利用单波长数据获得精度较高的计量值，达到扩大传感器测量范围的目的。
The metering data, which is more accurate than the data from the dual wavelength. can be acquired by a single wavelength.
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