Catalysts were characterized by XRD and BET method.

通过XRD及BET表面积测定表征催化剂。

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XPS. XRD and BET method was used to characterize the catalysts.

应用XPS, XRD和BET比表面测定方法对催化剂进行了表征。

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FSSS method, laser diffraction method and BET method were used to perform the particle size measurement.

将供给态粉和研磨态粉由激光衍射法、FSSS法和BET法测量出颗粒粒度。

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"It's a big bet, with a risky landing method and no back-up, " said space analyst Howard McCurdy at American University.

WSJ: Mars Mission Seeks a Happy Landing