THE EXAMINATION OF THE QUALITY OF RETAINING WALL MADE OF MORTAR AND STONES BY MEANS OF COMPARING THE FREQUNCY SPECTRA OF ELASTIC REFLECTION WAVES是什么意思_THE EXAMINATION OF THE QUALITY OF RETAINING WALL MADE OF MORTAR AND STONES BY MEANS OF COMPARING THE FREQUNCY SPECTRA OF ELASTIC REFLECTION WAVES在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句