Two design strategies that three-way valve control unsymmetrical cylinder and four way valve control symmetrical cylinder were analyzed from principle and system structure aspects.

对船用舵机泵控系统中位置控制单元的三通阀控制非对称缸和四通阀控制对称缸的两种设计方案进行了理论分析和系统结构分析。

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We studied the characteristics of dominant frequency of infinite horizontal cylinder in compensated factor and quve the linear compensation way of two-dimensional bodies.

研究了无限长水平圆柱体的补偿因子中主频段的特性，给出了二度体的线性补偿方式；

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