同时，对钙基膨润土人工钠化进行了研究。

Meantime, the study of the modification of calcium bentonite was made.

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较全面地探讨了锂-钙基脂的组成、制备工艺和条件。

The composition, preparation technology and condition have been studied.

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较全面地探讨了锂-钙基脂的组成、制备工艺和条件。

The composition, preparation technology and condition have been studied.

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