胀缩是一个可逆过程。

Expansion-contraction is a reversible process.

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研究了膨胀土路基发生胀缩沉降的基本力学条件；

The fundamental mechanical conditions of the swell-shrink and settlement are studied.

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研究了膨胀土路基发生胀缩沉降的基本力学条件；

The fundamental mechanical conditions of the swell-shrink and settlement are studied.

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