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By the conventional unsymmetrical method and its negative-sequence network of fault calculation,this paper calculates negative-sequence current in open phase with one phase open or one phase closed of generator transformer broken.

1问题的提出目前国内从事发电的继电保护技术人员针对发变组启动失灵保护负序判据整定各有不同的看法，主要是需要考虑在启停机过程发生非全相失灵的情况。

While there are different types of relief valve designs, the basic principle is that when the pressure in the equipment exceeds the relief valve's set pressure, the relief valve will open and remain open until the pressure is reduced below the set pressure, after which the relief valve recloses to seal the system.

安全阀虽然有不同种类的设计，但他们的基本原理是一样的，当设备里的压力超过安全阀的设置压力时，安全阀就会打开卸压，直到设备里的压力降低到低于设置压力后安全阀会重新合上，并保持系统封闭。

The cut-off valve with pilot valve without hand wheel, stem and lift nut inside will guide block and guide slot Butterfly Valves to guide sleeve, the disc-shaped disc to disc type bowl shape, and holes in the bottom of the flap valve to open, the valve cover of the original valve stem hole to hole diversion, because of increased pressure ring, ring, and the valve flap to class mortar, so that the flow passage separated the upper chamber cavity, external cavity, cavity, in the cavity and The external cavity increases with draft tube and stainless steel manual ball valve, flap valve in the cover plate and the center of the end of installing the spring, the upper flap valve install compression seal of the pressure ring, outside the cavity of the wall to open a Drainage holes.

带先导球阀的截止阀无手轮、阀杆和内升降螺母，将导向块与导向槽改为导向套，将盘形阀瓣改为类钵体形阀瓣，并在底部开阀瓣孔，电动蝶阀将阀盖原阀杆孔改为导流孔，因增加压环、密封圈和将阀瓣改为类钵体，使上通流腔分隔为上腔、外腔、内腔，在上腔与外腔的外部加设有导流管与不锈钢手动球阀，在盖板与阀瓣底的中心部加设弹簧，阀瓣上部加设压紧密封圈的压环，在外腔的壁上开有放水孔。

Usually they won't pop open like pin tumbler locks, they just slide open; you don't get the warning that a pin tumbler gives before it opens because there is less contact area on the wafer's edge than on a pin, so the sense of climax is reduced with these types of locks.

通常他们不会像流行开不倒翁密码锁，他们只是滑开；你不会警告说，一个大头针不倒翁gives才打开，因为有这么多的接触面积就硅片的边缘不是一个大头针，所以感觉，高潮是降低与这些类型的门锁。

When the amount of fluid into the evaporator, the evaporator heat load is less than required, then the evaporator superheat steam export increases, the pressure is greater than the bottom of the top diaphragm pressure to force the diaphragm down so that bulge through the mandrel compression spring, and the valve pin to open the top, so that valve to open big holes are for fluid volume increase.

当进入蒸发器的液量小于蒸发器热负荷的需要时，则蒸发器出口蒸气的过热度增大，膜片上方的压力大于下方的压力，这样就迫使膜片向下鼓出，通过顶杆压缩弹簧，并把阀针顶开，使阀孔开大，则供液量增大。

Firstly, the mechanical analysis on the stability of deep-concave open pit slope based on the theory of elasticity has been presented, thus offering the probable cause theoretically for using the convex-form slope in the deep-concave open pit on one hand and the preliminary method to determine the rational shape of slope on the other hand.

首先，基于弹性理论对深凹露天矿边坡的稳定性做了力学分析，从而为凸形边坡在深凹露天矿的应用提供了理论依据，同时为确定合理的边坡形状提供了初步方法。

The dealer told him that it had just come in, but that he could not be bothered to open it. Frank begged him to do so and the dealer reluctantly prised it open.

这些痕迹是游牧人留下的，他们生活在从公元前约 35，000 年到公元前 10，000 年的冰川期的末期，以狩猎，捕鱼为生。

If as a result of body shell keycap stuck with the key causes of the "key card" failure, may be key in the cap and put a gasket between the pads can be used稍硬some plastic (such as floppy disk jacket abandoned) made, its size is equal to or slightly larger than the key body size, and location by the rod through the ammonium can open a free passage under the square hole, in accordance with its set of poles, the plug cap; use this pad chip cap with the key body to prevent stuck, you can repair button; If as a result of spring fatigue, shrapnel resistance causes large card key failure, then the Special button to open the body, a little stretching to restore flexibility to reset the spring; Remove the key precursor to the resumption of shrapnel.

若是由于键帽与键体外壳卡住的原因造成&卡键&故障，则可在键帽与键体之间放一个垫片，该垫片可用稍硬一些的塑料做成，其大小等于或略大于键体尺寸，并且在按杆通过的位置开一个可使铵杆自由通过的方孔，将其套在按杆上后，插上键帽；用此垫片阻止键帽与键体卡住，即可修复故障按键；若是由于弹簧疲劳，弹片阻力变大的原因造成卡键故障，这时可特键体打开，稍微拉伸复位弹簧使其恢复弹性；取下弹片将键体恢复。

Thirdly, on the basis of the productivity model of ideal wells , we comprehensively consider the additional pressure caused by different completion methods and establish four structures of multilateral horizontal wells in 8 different completion methods of the actual open hole completion, slotted liner completion,slotted liner completion with external casing packer, open hole downhole gravel pack completion, openhole prepacked gravel liner completion, casing perforated completion, inside casing gravel pack completion, inside casing prepacked gravel liner completion.

在理想井产能模型的基础上，综合考虑不同完井方式所造成的附加压力损失，建立了这四种分支水平井结构在实际裸眼完井、割缝衬管完井、带ECP的割缝衬管完井、裸眼井下砾石充填完井、裸眼预充填砾石筛管完井、射孔完井、套管内井下砾石充填完井、套管内预充填砾石筛管完井等8种不同完井方式下的产能模型。

Change when accumulator, must notice to be distinguished first losing terminal, tear open the jumper on negative pole column first next, tear open again

更换蓄电池时，一定要注重先分清正负极柱，然后先拆负极柱上的连接线，再拆

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。