The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No.是什么意思_The paper introduced the use of airlifting reverse circulation rotary drilling techniques in practice of major diameter socket pile operation at Xiangfan city s Hanjiang No.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句