By which we took Hei Dai Gou open pit coal mine as an example to study the plan ,devise and practice of land reclaimation in the specific open pit coal mines.是什么意思_By which we took Hei Dai Gou open pit coal mine as an example to study the plan ,devise and practice of land reclaimation in the specific open pit coal mines.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句