参考白度计的校准方法对铅芯浓度仪的校准方法进行了研究。

And its calibration method study took that of the whiteness meter as reference.

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参考白度计的校准方法对铅芯浓度仪的校准方法进行了研究。

And its calibration method study took that of the whiteness meter as reference.

youdao