由此得出了判别重特征线性偏微分算子亚椭园性和局部可解性的若干充分条件。

From this, we obtain some sufficient conditions for hypoellipticity and local solvability of those operators.

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结论局部松解可改善实验性膝关节退行性变模型的被动活动度。

Conclusion: the local loosening therapy can improve the range of passive movement of the experimental knee joint degeneration model.

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