本系统使用最简单的轴流类滑套作为流量控制阀，用以封堵、隔离和选择油层，并采用全液压方式进行动作控制。
The system uses the simplest axial-flow sleeve as flow control valve to blank off, isolate and select reservoir. The system adopts all-hydraulic operation.
本系统使用最简单的轴流类滑套作为流量控制阀，用以封堵、隔离和选择油层，并采用全液压方式进行动作控制。
The system uses the simplest axial-flow sleeve as flow control valve to blank off, isolate and select reservoir. The system adopts all-hydraulic operation.
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