The test and calculation results show that with prestressing not only the opening of the contraction joints is distinctly reduced, but also the natural frequency of arch dam increases in some degree.是什么意思_The test and calculation results show that with prestressing not only the opening of the contraction joints is distinctly reduced, but also the natural frequency of arch dam increases in some degree.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句