The second is the hydraulic pressure servo-control system.
第二种是液压伺服控制系统。
The scheme of hydraulic pressure system, test system and control system were studied out elementarily.
初步拟定了该机的液压、检测及控制系统的方案。
Hydraulic control technology: hydraulic direction, pressure, flow control valve, proportional valve, ball valve.
液压控制技术：液压方向、压力、流量控制阀、比例阀、球阀。
Hydraulic control technology: hydraulic direction, pressure, flow control valve, proportional valve, ball valve.
液压控制技术：液压方向、压力、流量控制阀、比例阀、球阀。
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