Aeidization and sand fracturing cooperation operation technology is a hot spot of new technologies developed for complicated hydrocarbon reservoir with low permeability.
酸化与加砂压裂协同作业工艺技术，是近年来针对低渗透等复杂油气藏所开展的热门新技术。
By abstracting component and component relationship, this paper studies three component operation relationships, namely transfer operation, cooperation operation and condition operation.
对构件及构件关系进行抽象化，研究了调用运算、协作运算和条件运算这三种构件运算关系。
China-Russia oil pipeline has been formally put into operation and the bilateral cooperation in the energy fields of coal, natural gas and electricity moves forward steadily.
中俄原油管道正式投产运营，煤炭、天然气、电力等能源合作进展顺利。
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