The analysis indicates that the unit operation of horizontal wells and vertical wells in reservoirs of low abundance occupies a dominant position in benefit, effectiveness of exploitation and.
根据已投产水平井的生产状况，分析水平井开发动态特征、影响产能的主要因素、递减情况，以及水平井在低丰度油藏的适应性及潜能。
By use of VVVF technology to directly control elevator door operation simplified the mechanical structure of elevator door device with low noise in door closing and leveling in exact position.
采用VVVF技术对电梯开门机直接拖动，使电梯门机装置机械结构简化，关闭时噪声低，且可靠到位。
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