目前用开关阀实现的气动伺服控制已成为流体动力控制领域竞相研究的对象。

At present, the pneumatic servo control using on-off valves has become a subject researched on competitively in the domain of fluid power control.

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结合试验结果和计算流体动力学的解析结果，研究液压锥阀的噪声评价方法。

Combining experimental solution and CFD analyses, a method to appraise noise of poppet valve was studied.

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使用流体动力定量管代替进样阀，用8种有机试剂作载流由流动注射原子吸收法测定12个元素。

The sensitivities of 12 elements has been invelstigated with 8 kinds of organic solvents used as carrier stream for FI-AAS, and by using a hydrodynamic conduit in place of injection valve.

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