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1·Hydraulic counterbalance valve is a key element in the hydraulic balanced loop, which is applied abroad in modern engineering mechanism especially in elevating machinery.

液压平衡阀是平衡回路中的关键元件，在现代工程机械特别是起重运输机械中应用广泛。

2·This paper makes a detailed study of the counterbalance valve and its sy tem, and discusses the effects of the control pistons forms and the main parameters on dynamic characteristic of the system.

本文详细研究了平衡阀控制活塞的结构形式和主要结构参数对系统动态性能的影响。