水压控制阀是水压传动系统中的关键控制元件，是水压传动技术研究的重要内容。
As a key control component in water hydraulic system, water hydraulic control valve is a vital part in study of water hydraulic technology.
水压控制阀是水压传动系统中的关键控制元件，是水压传动技术研究的重要内容。
As a key control component in water hydraulic system, water hydraulic control valve is a vital part in study of water hydraulic technology.
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