The old light oil reservoirs in Shuguang Oilfield are deeply buried and low productive.The effect is poor by deepening pump depth with common pumps.是什么意思_The old light oil reservoirs in Shuguang Oilfield are deeply buried and low productive.The effect is poor by deepening pump depth with common pumps.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句