查询词典 stagnation pressure

After giving a brief analysis of pressure hazards and accident simulation methods, the authors introduce the system of European PED - EN system for pressure equipment in order to eliminate or reduce pressure hazards by studying 97/23/EC Pressure Equipment Directive and EN13445 Unfired Pressure Vessels and describe the impacts of PED - EN system on the ASME pressure vessel codes and the...

本文在简要分析压力危险以及事故后果模拟方法的基础上，先结合97/23/EC《承压设备指令》、EN13445《非火焰接触压力容器》等规范标准，介绍以消除或降低压力危险为出发点的欧盟承压设备规范标准体系，再介绍美国应对欧盟97/23/EC《承压设备指令》的对策措施，最后提出按压力危险程度确定承压设备的范畴、以标准应满足法规要求的理念建立承压设备法规标准体系、开展承压设备基本安全要求研究、研究承压设备最新规范标准和我国应对策略、成立中国承压设备研究委员会等建议。

The most heavy flow ability of barrage swirl is controlled by fastenning device and barrage size, the most heavy discharge is more when barrage aperture is bigger, the influence of barrage position on discharge is not obvious; The pressure of the end of the shaft and fastenning device increases which aroused by barrage, and there is a restraining action to flow waving of the shaft; The barrage aperture is smaller, the increase of pressure is heavier, the influence of position to the increase of pressure is not obvious; The positive pressure of the level section in the hole between fastenning device and barrage increases obviously, the change of press along length reduces, mural press in the hydrosphere separating area of outlet of fastenning device becomes positive pressure, which is propitious to the increase of flow cavitate number in the low pressure area of the outlet of fastenning device; The influence of change of swirl cavum diameter caused by barrage to ventilating state is obvious.

阻塞旋流最大泄流能力由起旋器及阻塞体型共同控制，降低了泄洪洞的泄流量，孔径大的阻塞最大下泄流量较大，阻塞位置对泄流量的影响不明显；阻塞引起竖井及起旋器端头压力增大，对竖井部分的水流波动具有抑制作用；阻塞孔径越小，压力增加越大，位置对压力增大影响不明显；起旋器与阻塞之间水平洞段的止压力明显增加，沿程压力变化减小，起旋器出口的水气分离区壁面压力变为正压力，有利于起旋器出口低压区水流空化数的提高；阻塞引起的旋流空腔直径变化对通气状态产生明显影响。

The techniques for measuring Hevea laticiferous turgor pressure which have been reported are summarized. The commonly used three methods used for measuring Hevea laticiferous turgor pressure have their limitation in deep and systematic observation of the variation of Hevea laticiferous turgor pressure and are not involved in the study of the variation of laticiferous turgor pressure under the normal ethrel stimulated tapping system. A possibility of using an improved cell pressure probe method which has been recently established for other plants is discussed in accurate measurement of the real time variation of Hevea laticiferous turgor pressure.

本文综述了橡胶树乳管膨压的测定技术及其变化规律的研究结果，发现现有的几种乳管膨压测定技术均存在一定缺憾，对乳管膨压变化规律的研究也因测定方法等的限制不够深入、系统，且未与目前生产上普遍使用的乙烯利刺激割胶制度联系起来；并展望了将植物细胞压力探针技术改进后用于橡胶树乳管膨压测定研究的可能性。

Ring, including high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial self-suction pump acid pH, vertical centrifugal pipeline Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pumps, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

Ring, including high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial self-suction pump acid pH, vertical centrifugal pipeline Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pump, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

Including Ring high pressure air, FRP acid pH blower, electromagnetic pump, auto-powder-bubble machine, sludge dewatering machine, coaxial vortex pumps, chemical liquid filters, coaxial acid pH self-suction pump, centrifugal vertical pipe Pumps, water-dirt pumps, horizontal direct-pumped, Shen stainless steel water pump, Gear pumps, two high-speed pumps, automatic booster pumps, automatic pressure booster pump, building water supply submersible pumps , Multi-Purpose centrifugal pumps, computer frequency constant pressure pump, electronic constant pressure booster pumps, reciprocating washing machines, pressure-pumping interactive tied, tied for interactive frequency constant pressure pump, stainless steel deep-well pump, dust collection machines and dust collection Equipment, gas-casual, casual trachea, and many other environmental chemical equipment and sewage treatment works, such as the planning design and construction.

包括环形高压风机，FRP耐酸硷送风机，电磁气泵，自动型粉体泡药机，污泥脱水机，涡流式同轴抽水机，化学液体过滤器，同轴自吸式耐酸硷泵浦，立式管道离心泵，沉水式污物泵，卧式直接式泵浦，沉水不锈钢泵，齿式水泵，两段高速泵，自动增压泵，压差式自动增压泵，大楼给水潜水泵，多段式离心水泵，电脑变频恒压泵，电子恒压增压泵，往复式清洗机，压差式交互并列泵浦，变频恒压交互并列泵浦，不锈钢深井泵，集尘机及集尘设备，散气盘，散气管等各式环保化工设备及污水处理工程的规划设计施工等。

For the stability of the flow metering pumps, metering pump flow rate, as some big changes with pressure, you can set the exit of metering pump back-pressure valve, so that the output of metering pump flow rate stability, and then usually selected back-pressure valve The Reducing Valves pressure of the actual use of a metering pump metering pump pressure or slightly less than the use of pressure.

用于稳定计量泵的流量，如某些计量泵的流量随压力变化较大，可在计量泵的出口处设置背压阀，使计量泵的输出流量稳定，这时一般选择背压阀的压力为计量泵的实际使用压力或略小于计量泵的使用压力。

When the pressure is low, the role of Poppet head pressure sufficient to overcome the pressure regulator spring force, Poppet Head is closed at this time there is no pressure on the oil through the damping holes on the balance of the piston movement, so a balance piston, the next two cavity pressure equal, balanced piston under the action of the spring force gently on the top of the seat, pressure port and overflow port unreasonable.

当压力较低时，作用在提动头上的压力不足以克服调压弹簧力，提动头处于关闭状态，此时没有压力油通过平衡活塞上的阻尼孔流动，故平衡活塞上、下两腔压力相等，平衡活塞在弹簧力的作用下轻轻地顶在阀座上，压力口和溢流口不通。

Main products: the accurate four pillars automatic balance oil pressure bias cutting machine ,the accurate four pillars planer-type oil pressure bias cutting machine,rocker arm oil pressure bias cutting machine,oil pressure flat embossing machine,vertical four pillars oil pressure bias cutting machine, portable bias cutting machine,belt embossing machine, one spindle oil pressure bias cutting machine,sponge ball grinder, splitting machine,thicknesser,hammer machine,gluing machine,flanging machine,etc.

主要产品有：精密四柱自动平衡油压裁断机、精密四柱龙门式油压裁断机、摇臂式油压裁断机、油压平面压花机、立式四柱油压裁断机、箱式裁断机、皮带压花机、单头式油压裁断机、海绵磨球机、片皮机、刨板机、锤仔机、上胶机、折边机等。

First according to the hydraulic pressure elevator system diagram, use the machine design and hydraulic transmission knowledge calculates the diameter of the plunger, cylinder tube wall thickness as well as cylinder bottom thickness; second, through the examination confirmation to the obtained result to complete the work of cylinder design; Simultaneously has carried on the component choice and the computation; Through to the system calorific capacity computation the and the volume of cooling water while the fuel tank cools when needs to complete the hydraulic pressure elevator fuel tank design; Based on the system oil stream condition to calculated the tube internal pressure lose, the local pressure loss as well as the all of the pressure lose to carried on the system checking calculation; Finally through the consult correlation design handbook to calculation and examines the belt, the band pulley, the axis, as well as the key, has completed the hydraulic pressure elevator pumping station transmission system design.

首先根据液压电梯系统原理图，利用机械设计与液压传动等方面的知识计算出柱塞的直径、缸筒的壁厚以及缸底厚度，并对所得结果进行校核验证完成了工作油缸的设计；同时进行了元件的选择和计算；其次，通过系统发热量的计算和油箱冷却时需要的冷却水量的计算完成了液压电梯油箱的设计；依据系统油流状态计算出管内压力损失、局部压力损失以及总压力损失进行了系统的验算；最后通过查阅相关设计手册对带、带轮、轴、以及键进行设计计算和校核，完成了液压电梯的泵站传动系统的设计。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？