短語詞組短語secondary gas recovery 二次采氣secondary y recovery 二次開采secondary thermal recovery 二次熱采secondary thermal recovery mode 二次熱采模式Secondary resources recovery 二次資源回收secondary oil recovery [油氣]二次采油secondary production recovery 二次開采deepwater secondary -recovery projects 深水二次開采項目secondary recovery waterflood 二次開采注水 返回 secondary recovery