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

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。

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This thesis provides original quality control system and makes it true based on study of SPC chart combining with valve manufacturer 'erp project.

本文结合阀门生产企业的ERP项目，在对SPC控制图的研究的基础上，给出了质量控制系统并加以实现。

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By using electronic expansion valve, combining with novel control methods, optimum control of refrigeration system and high energy-saving effects can be realized.

配合新型控制方式，可以实现制冷系统的优化控制和大幅度地提高节能效果。

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