闸

The flow through gate valves can be from either end.

流体可以从闸阀的任一个端口流入。

Use full flow ball or gate valves only.

只选用全通道球阀或闸阀。

This formula is more accurate and has wider applications than others. The principle of the turbulent wave in open channels has been used to explain the physical nature of submerged flow under the gate.

文中应用明渠干扰波传播的原理对孔流淹没的物理本质进行了解释，并根据干扰波波速与闸下收缩断面流速相等的条件导出了孔流淹没的判别式。

Its subject coverage includes: press shop tools and technology, including tools, brakes, feeder systems, press forming; turret, punch, mechanical, and hydraulic presses; and stamping, hot and cold pressing, and more.

它的主题报导包括：压制车间工具和技术、包括工具、闸、供料系统、压制成型；塔楼、冲压、机械和液压传动装置压制；压印，热和冷压以及更多。

In this paper, the basic principle of the conventional slip energy recovery induction motor drive is discussed. Two kinds of slip energy recovery induction motor driving systems with high factors are discussed, and the performance analysis of these methods is compared. On the basis of above, a new type of three-phase and four-line slip energy recovering drive is proposed.

本文首先从普通串调原理入手，简要分析了影响串调系统功率因数的主要因素；在对三相四线双晶闸管串级调速、新型GTO串级调速等几种高功率方案进行分析与比较的基础上，提出了一种新型三相四线制双IGBT串级调速控制方案。

The product consists of an electromagnet which mounts on the fixed frame and a strike plate which mounts on the moving door or gate.

产品由安装在固定边框上的电磁铁与安装在活动门或闸上的撞击板组成。

The measuring systems are successfully used in the electromagnetic pulse measurement generated by impulse voltage discharge and switch operation in 500kV substations. Full waveforms of transient electric field, transient magnetic field, transient voltage of high frequency relay channels and low voltage alternative current power during switch operation period have been obtained, and the fast transient pulses in high frequency relay channels and AC power have been caught.

将该套测量系统成功地应用于500kV变电站开关操作产生的电磁脉冲的研究中，得到了开关刀闸操作时暂态电场、磁场、高频通道、交流电压等的完整波形，发现低压交直流电源系统和高频保护通道中存在非常严重的脉冲群干扰，初步解释了变电站二次电源模块经常损坏和高频保护经常误动的原因，提出了加强保护和研究的建议，进一步验证了测量系统的先进性。

In this paper, according to the historical information of constructing the FengMan dam as well as its geographical location and natural climate condition, various factors led to cracks of gate frusta are expatiated in detail.

本文根据丰满大坝修建的历史资料，以及其所处的地理位置和自然气候条件，详尽阐述了促使闸墩裂缝产生的各种原因。

The scientific and rational project of reinforcement of the gate frusta is constituted according as the results of calculation. The various measures of reinforcement are analyzed and calculated in detail.

依据计算结果，制定出科学合理的闸墩裂缝加固方案，并对各种加固措施进行了仔细的计算分析。

Three dimension and turbulent are common characteristic of fluid flow problem in nature and added free surface for the best familiar fluid-water, such as flood discharge flow around frusta of brake in waterpower project, flow around hull in ship engineering, and so on, all have the three characteristics which are the very important study content and aspects in CFD.

摘要自然界中的流体流动问题一般都具有三维性和湍动性，对于最常见的流体—水则同时还拥有自由表面，水利工程中绕闸墩的泄洪水流、船舶工程中的船体绕流等均具有上述流动的三种特性，这三种特性是计算流体力学领域非常重要的研究内容和方向。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。