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Presents the operating principle, deduces the temperature-saturated steam pressure relationship, analyses the force balance of valve plates, and points out the factors determining the action of valve plates and the key problems in making this trap domesti
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摘要介绍了膜盒式蒸汽疏水阀的工作原理，推导得到了膜盒内介质的温度－饱和蒸气压关系式，分析了阀片的受力平衡，指出了决定阀片动作的因素和膜盒式蒸汽疏水阀国产化进程中要解决的关键问题。 |
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Presents the simple but highly reliable on-line detection of ultrasonic transducer clamping capacitance based on the impedance circuit model constructed through the impedance characteristics of the ultrasonic transducer under triple harmonics, and conclud
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为了解决大功率超声应用的换能器电端匹配问题，分析了超声波换能器在谐振频率三次谐波下的阻抗特性，给出了超声换能器三次谐波下的阻抗电路模型.并根据阻抗电路模型建立了对超声换能器的夹持电容实现在线检测简单、可靠性高的方法，实验证明该方法有效的.该方法可以在换能器工作过程中随时检测夹持电容的变化，根据检测结果对匹配电感进行动态调整，实现真正意义上的换能器电端的动态匹配，从而大大改善匹配质量，提高系统的工作性能. |
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Presents the study on the cross-effect of heat and mass transfer of capillary porous media A.B.Luikov set up on the irreversible thermodynamics principle with the theoretical solution of unsteady drying process given and its validity verified though exper
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针对雷柯夫建立在不可逆过程热力学原理上的传热与传质方程组，着重研究毛细多孔介质内传热与传质过程中的交叉效应.得出了非稳态干燥过程的理论解，并通过实验验证了其正确性,利用该模型分析了干燥过程中各因素对内部温度场和湿度场的影响以及交叉效应在干燥过程中的作用. |
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Presents the theoretical model of pressure drop for flexible duct.
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摘要介绍了柔性风管压力损失的理论模型。 |
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Preseration is the best means of reconstruction. Sae eery structure.
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保留是重建的最好方法。尽可能保留每一个结构。 |
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Preservation and anti-microbial technologies for food, agriculture and other industries.
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保鲜及抗菌技术：食品、农产品之保鲜抑菌，及其他产业抗菌相关技术。 |
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Preservation is the best means of reconstruction. Save every structure.
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保留是重建的最好方法。尽可能保留每一个结构。 |
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Preservation metadata plays an important role in assuring the long-term access to digital information.
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保存元数据在确保数字信息被长期获取方面扮演着重要的角色。 |
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Preservation of capital is so important to be able to continue to play this game.
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要想继续玩交易,保护好本钱太重要了. |
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Preservation, identification, extrication and documentation of computer evidence; giving ability to gather files, lltbkfdt collect backups of data, gives tools to look at what was going on with data.
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保存、鉴别、抽取和归档计算机证据；提供能力来搜集文件和数据备份，提供工具来观察过去的时间里发生的与数据有关的事件。 |
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Preserve all the copyright notices of the Document.
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保存『文件』的所有版权声明。 |
