运用水射流理论与土力学理论，建立了水射流土层扩孔方程。
The equation of soil bore enlarging with water jet was established based on the water jet theory and soil mechanical theory.
运用水射流理论与土力学理论，建立了水射流土层扩孔方程。
The equation of soil bore enlarging with water jet was established based on the water jet theory and soil mechanical theory.
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