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When the moment made by material on turning plate is greater than that of heavy hammer and rocker, the disc will open adown to discharge. After discharge the moment made by heavy hammer and rocker will drive disc close quickly to realize locking air. Because the structure of valve is two-layer, there is always one disc in pipe that is in close condition. So it can discharges and lock air at the same time.

即当作用于翻板上的物料产生的力矩大于重锤摇杆产生的力矩时，阀板打开卸灰，一旦积灰卸去后，重锤与摇杆产生的力矩使阀板迅速关闭，实现锁气是由于本阀采用的是双层结构，因而使管道上阀板始终有一个是关闭状态，可使卸灰与锁气同时达到目的。

One, control member it is empty pipe line of business the intelligence that control of the traffic in the most important resource sky is danger of a Gao Feng works, get information ceaselessly, the analysis evaluates trends, decisive make judgement decision-making, issue instruction information, deploy safe control interval to run medium aerostat at any time, handle all sorts of bolt in time special affection.

一、管制员是空管业最重要的资源空中交通管制是一项高风险的智力劳动，不断地获取信息，分析评估动态，果断作出判定决策，发出指令信息，随时为运行中的航空器配备安全的管制间隔，及时处理各种突发特情。

As a downstream piping system when the valve opens, reflux valve, when closed, the main medium used to prevent backflow to prevent the pump and drive motor reversal, as well as a container medium discharge; currently the most commonly used is the valve flap around the body Swing Pin rotation flap valve and the valve body along the vertical axis to move lift check valve, but the above two kinds of structures exist in the valve closed, medium speed back quickly from the largest drop to zero, inlet side of the pipe resulted in the rapid pressure rise, resulting Proportional Pressure Reducing Valves in damaging effects on the piping system of water hammer phenomenon, it is generally a diameter of valve production of 50 ~ 500 mm.

止回阀作为管道系统顺流时开启，逆流时关闭的阀门，主要用于防止介质倒流，防止泵及驱动电机反转以及容器内介质泄放；目前使用最普遍的是阀瓣围绕阀体销轴旋转的旋启式止回阀和阀瓣沿着阀体垂直中心线移动的升降式止回阀，但以上2种结构的阀门均存在关闭时介质倒流速度从最大迅速降为零，致使管道进水管一侧内压迅速升高，从而产生对管路系统有破坏作用的水锤现象，所以一般止回阀生产口径为50～500 mm。

In view of seperated layer polymer injection of partial wells at the Xing 13 area---polymer industry pilot area in Daqing Oil Field, main research content of this article is to design and applicate the minor diameter pipe and the necessary tool to flood polymer seperated in the casing-damaged well.

针对大庆油田杏十三区聚合物工业试验区部分井开展的分层注聚，本文的主要研究内容是套损井聚合物驱小直径分注管柱及配套工具的设计和应用。

In fact, pipers in all parts of the world, but why is everybody remember only that Scotland Pipe Band? Because in the minds of the people of the world, not a single Scottish bagpipe music refers to itself, it also connected to a long list of representatives of the Scottish Highlands of traditional culture has long history of Scottish culture into an integral part.

其实 风笛在世界各地都有，但为何大家却独独记得苏格兰风笛﹖只因在世人心中，苏格兰风笛并不是单指乐器本身而言，它还连接着一长串代表苏格兰高地传统文化的历史也早已升华为苏格兰文化中不可或缺的一部份。

In view of high ammonia loss, tail gas washing section is improved. Absorbing ammonia in Venturi tube, first and second washing tower, the concentrated phosphoric acid is pumped to pipe reactor at the neutralization degree of 0.5; all spouts in washing towers are replaced by spiral spouts and equipment anticorrosion is finished. After improvement, the ammonia recovery rate is increased to over 95% from the previous 85%.

由于管式反应器工艺存在氨逸出率高氨损失大的弊端，提出改造尾气洗涤工艺：将用于生产DAP的浓磷酸全部先在文丘里，第一第二洗涤塔吸收氨后，将中和度0.5的浓磷酸洗涤液送管式反应器；各洗涤塔的所有喷嘴改造为不同型号的螺旋喷嘴；并注意解决洗涤设备的防腐问题改造后氨回收率由85%提高到≥95

PTFE referred to F4, because of its excellent dielectric properties and corrosion-resistant chemical (high temperature of the molten fluoride elements and the state of alkali metal), non-absorbent, non-stick, not conductive, low coefficient of friction and not Ageing properties, and is widely used in chemical, petroleum, textile pharmaceutical, metallurgy, machinery, electronics, electrical appliances, electricity, food and aviation, military and scientific research in all walks of life, I plant the development of metal bellows, compensation , PTFE bellows F4 tetrafluoroethane compensator, F4 metal composite compensation, anti-corrosion steel liner tetrafluoroethane pipe, steel-lined tetrafluoroethane three links, elbow, Stone, the reaction tower, tower chloride, lining tetrafluoroethane valve Doors, tetrafluoroethane pads and steel-lined polypropylene pipes and accessories, and earnestly solve the user in the production process by the various anti-corrosion problems.

聚四氟乙烯简称F4，由于其优异的介电性能与耐化学腐蚀性(高温下的氟元素和熔融状态下的碱金属外)，不吸水、不粘、不导电、摩擦系数低及不老化等性能，而被广泛应用于化工、石油、轻纺制药、冶金、机械、电子、电器、电力、食品及航空、军用与科研等各行各业中，我厂开发的金属波纹管、补偿器，四氟波纹管F4四氟补偿器、F4金属复合补偿器，钢衬四氟防腐管件，钢衬四氟三通、弯头、四通、反应塔、氯化塔、衬四氟阀门，四氟垫片以及钢衬聚丙稀管道及配件，切实解决了用户在生产过程中所遇到的各种防腐问题。

After dinner pipe Mingqiang went away after the two units, with Yang Meng-Tsan Chiang twisted my look on in the county did not buy copies of eating KFC on the back, and coming home to see Yi Xi-two people rely on exhausted fell asleep on the sofa , Yang sat down on a quiet seat next to doing winter work, Meng-Tsan Chiang mp3 driving while listening to music, reading fashion magazines, turned up in the afternoon sun was very warm, bathed in the branches Chanchanmianmian the middle, there is a ray of light exposure to the plum star body, Rou Rou's gently.

吃饭后管明强送走两人之后去了单位，孟灿带杨晓月在县城里转了转看没有买的吃了份肯德基就回来了，到家看易夕两个人靠沙发上疲惫的睡着了，杨晓月安静的坐到旁边的座位上做着寒假作业，孟灿开着mp3听着音乐边翻开时尚杂志看了起来，午后的阳光非常温暖，缠缠绵绵沐浴在树枝中间，有一丝光线照射到李子星的身上，柔柔的轻轻的。

After dryness, silica powder is put into chlorinated furnace in fluid bed and reacts with dried hydrogen chloride gas in the environment of 340℃ to form crude trichlorosilane. The crude trichlorosilane , through hydroscrubber and pipe bundle condenser to extract silicon tetrachloride in distillation column produces trichlorosilane gas out of the d istillation column , which can be made into the finished product of trichlorosilane by condensation .

硅粉经干燥后加入氯化沸腾炉，与通入炉中的干燥氯化氢气体在340o C进行反应，生成的粗三氯氢硅经湿法除尘器、列管冷凝器去蒸馏塔分离匹氯化硅，由蒸馏塔出来的三氯氢硅气体经冷凝，制得三氯氢硅成品。

The rapid changes in pressure often results in the throat of the pipe through the middle ear imbalance in internal and external pressures.

压力的急遽变化，往往造成喉咙直通中耳的管路内外压力不平衡。

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。