The technique has gained oil production in unprofitable No. 6 Sand zones in S4 member effectively, and has increased the recoverable reserves.是什么意思_The technique has gained oil production in unprofitable No. 6 Sand zones in S4 member effectively, and has increased the recoverable reserves.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句