四

At first, the rought C〓F〓 mixed gases are obtained by pyrolysis process of R22. A experimental pyrolysis device is designed and made by ourself. The optimum operating conditions are offered in the paper. Secondly, the much efforts is on the synthesis of R134. After through the discussion of basic thermodynamics and kinetics, selecting and preparating catalyst, it is possible that the synthesis of R134 by pyrolyzed gases hydrogenation. Base on the character of catalytic process, the kinetics equation about C〓F〓 catalytic hydrogenation is established. The rate constant of the reaction is obtained through experiment data regression. In order to achieve higher yield of R134, some optimum technological conditions is determined.

论文首先对R22裂解制成四氟乙烯混合原料气的裂解过程进行了讨论，自行设计和制作裂解反应装置，并确定裂解反应的最佳操作条件；然后，重点对R134的合成进行基础研究，分别从热力学和动力学的角度探讨以含四氟乙烯的R22裂解混合气为原料合成R134这一全新工艺的可能性，选择和制备加氢催化剂，根据催化过程特点建立四氟乙烯催化加氢反应的总包动力学方程，并在此基础上自行设计和制作中试合成装置，获得了以裂解混合气为原料合成R134的最佳工艺条件，为R134的工业化生产提供了必要的理论依据和实验基础。

Finally, and in a process known as "quartet channeling," the quintets are distributed sequentially over each of the four channels, with each channel being in the form of a wire pair in a four-pair configuration.

最后，在一个被称为&四路通信&的过程中，5位比特被连续分配到四个信道中的一个，每一个信道采用四对双绞线中的一对。

After controlling for other known risk factors for dementia, including age and homocysteine levels, and dividing the study population into fourths based on levels of DHA, the researchers found that men and women in the quartile with the highest DHA levels had a 47 percent lower risk of developing dementia and 39 percent lower risk of developing Alzheimer's disease than the other three quartiles with lower DHA levels.

在控制了其他已知痴呆的危险因素，包括年龄，同型半胱氨酸水平，而分化的研究人口四成(25%)的基础上水平的DHA，研究人员发现，男性和女性在四分以最高DHA含量进行了47个百分点降低容易患痴呆症，39%的低风险开发阿尔茨海默病比其他三个四分较低DHA含量。

These four points, where the Seine intersected the wall of the capital, the Tournelle and the Tour de Nesle on the right, the Tour de Billy and the Tour du Bois on the left, were called pre-eminently,"the four towers of Paris."

塞纳河把京城的城廓切成四个点，左岸为小塔和纳勒塔，右岸是比利炮台和树林炮台，这四个点被誉称为巴黎四塔。

Contact person:Mr. Wu contacts the telephone:+8613714094646( the brush-off message) this newses do not usually release, please reserve and turn hair for personage who have the demand!

联系人：吴先生联系电话：+八六一三七一四零九四六四六本消息不经常发布，请保留和给有需要的人士转发！

Contact person:Mr. Wu contacts the telephone:+8613714446695( the brush-off message) this newses do not usually release, please reserve and turn hair for personage who have the demand!

联系人：吴先生联系电话：+八六一三七一四四四六六九五本消息不经常发布，请保留和给有需要的人士转发！

Mechanical properties of the four-component filament/staple fiber core-spun yarn and its core yarn (PET/PU interlaced yarn) were tested by electronic single yarn strength tester, the hairiness was tested by hairiness tester, and the evenness was tested by electronic evenness tester.

用电子单纱强力仪测试了复合纱芯丝及四组分长丝／短纤复合纱的力学性能，用纱线毛羽仪测试了四组分复合纱线的毛羽，用电子条干均匀度仪测试分析了四组分复合纱线的线密度不匀率。

Candy will be half plus half of the candy to the first block of a child; of the remaining one-third of the candy with candy third block to the second child; candy will be left with the fourth quarter to the third block candy child; candy will be left with the fifth block fifth candy to the fourth child; the last remaining 11 candy to the fifth child.

将全部糖果的一半再加二分之一块糖果发给第一个小孩；将剩下糖果的三分之一再加三分之一块糖果发给第二个小孩；将剩下糖果的四分之一再加四分之一块糖果发给第三个小孩；将剩下糖果的五分之一再加五分之一块糖果发给第四个小孩；将最后剩下的11块糖果发给第五个小孩。

The retardation of the quarter-wave plate is obtained through the four light intensity values.

通过检偏器组的四束光束的光强由四象限探测器同时测量。1/4波片的相位延迟量由这四光束的光强得到。

Eight years of continuously updated modern printing equipment, train a number of high-quality printing of highly skilled technical personnel, has the introduction of foreign advanced printing equipment, now has produced outside of Japan Mitsubishi four-color, produced in Sweden Fourth, sauna open four-color, and monochrome machines 08,03 and self-adhesive labels, bar code printing machines, equipped with beer, hot, sticky, mounted boxes, folding, binding, wire-bound, including chiropractors, YO binding, rehabilitation membrane, UV had a full set of oil after the process.

八年来不断更新现代化印刷设备，培养出一批高素质高技能的印刷技术人才，先后引进国外先进印刷设备，现拥有日本出产的对开三菱四色、瑞典出产的四开桑拿四色，以及单色08、03和不干胶标签机、条形码印刷机型，配备啤、烫、粘、裱盒、折页、胶装、线装、包脊、YO装订、复膜、UV过油等全套后工序。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。