Equipped with suitable Derrick and well controlled device in drilling a shallow gas well ,water drills proved to be able to reduce shallow gas well drilling cost.是什么意思_Equipped with suitable Derrick and well controlled device in drilling a shallow gas well ,water drills proved to be able to reduce shallow gas well drilling cost.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句