Construction difficulties of cast-in-situ pile in percussion drilled hole in new Guangzhou Baiyun airport project and technical countermeasures是什么意思_Construction difficulties of cast-in-situ pile in percussion drilled hole in new Guangzhou Baiyun airport project and technical countermeasures在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句