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。
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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