按照通常方法，测定了它们的比表面积、堆积密度、骨架密度。

Their specific surface areas and apparent and skeletal densities were determined according to conventional methods.

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按照通常方法，测定了它们的比表面积、堆积密度、骨架密度。

Their specific surface areas and apparent and skeletal densities were determined according to conventional methods.

youdao