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Sulfur corrodible sites and their characteristics were introduced of the prefractionation system, air preheaters of heating furnace and product air coolers etc,and chlorine corrodible sites and their characteristics were also presented of the thermocouple casing tubes, product air coolers and fire arrestors of heating furnace etc in the catalytic reforming and diesel hydrogenated unit s.

介绍了中国石油哈尔滨石化公司催化重整及柴油加氢装置在预分馏系统、加热炉空气预热器、加氢装置反应产物空冷器等处易发生硫腐蚀和在预加氢热偶套管、加氢反应产物空冷器、加热炉阻火器等处易发生氯腐蚀的部位及其表现特征，指出装置在低温(不高于120℃)、含水、容易被堵塞的部位易形成HCl-H2S-H2O腐蚀体系，分析了腐蚀原因和介质来源，总结和提出了开好原油的电脱盐、采用脱氯技术、加强对加热炉的排烟温度控制和腐蚀介质的精制与净化、加大空冷器的注水量等针对性防腐经验和措施。

Based upon the theory of empty category on PRO and pro, this paper conducts research on the differences and similarities of empt...

为了对空语类理论的进一步了解，本文依据空语类理论中的两种空语类PRO和pro，就汉语语法和英语语法中空语类的异同进行讨论。

The results shown that, for the typical kind of photonic crystal fibers with hexagonally arrayed circular air holes, the band gap of acoustic wave of XY mode appears only when the air holes' filling rate is greater than certain threshold value, and the upper and lower boundary values of the band gap decrease with the increasing of the air holes' filling rate.

结果表明，对于较为常见的空气孔排列为六角密排结构、空气孔形状为圆形的实芯光子晶体光纤，只有当空气孔的填充率大于一定阈值时才出现较明显的XY模态声波的带隙，并且最低与次低带隙的上下边界均随空气孔的填充率的增大而下降。

All countries scholar have been looking for new cavitation to replace the ultrasonic cavitation technique, the hydrodynamical technique have lower cost and equipment simpler characteristics than the light or particle cavitation , so it was valuable of

本文所做的主要工作及所取得结论： 1 设计并组装了一套水动力空化反应循环系统； 2 设计了3种不同型号(孔径分别为1毫米、2毫米、4毫米)的多孔板； 3 比较了不同板在不同条件下的空化效应强弱； 4 利用该装置对大肠杆菌菌液进行消毒杀菌的实验研究；结论：(1)在孔径较小时，空化效应更强

At the same time, it first uses hydromechanical coupling theory to analyze the influence of groundwater during disposal, and contributes to promote further study of abandoned stope disposal.

同时，在采空场处理研究领域，首次运用渗流应力耦合理论分析了地下渗流对采空场处理的影响，为深入开展采空场处理研究发挥了重要作用。

Distributor of CompAir in Shandong Province, mainly brand name include: Hydrone, Demag, LevRoi, Holman etc, and service for AC machine sizing and maintanance.

包括英国Hydrone滑片式空压机，德国Demag螺杆式空压机，英国LevRoi高压机，英国Holman移动式空压机等。

Up to now, the performance analysis of noncoherent space-frequency coding whose receiver does not know the channel state information and the methods to reduce the encoding-decoding complexity have not been solved, and this has constituted a bottleneck of the research of noncoherent space-frequency coding.

非相干空频码具有接收端不需要知道信道信息的特点，而到目前为止，针对非相干空频码的性能分析和如何降低编译码复杂度的问题还没有得到很好的解决，这些问题已成为研究非相干空频码的瓶颈。

Oilless low pressure series air compressors Miniature oilless lubricated air compressors belong to reciprocating, piston, single action and air-cooled portable air compressors, they are designed for the departments which need pure air source and higher environmental requirements.

低压系列空压机全无油润滑空压机的用途和适应范围微型全无油润滑空气压缩机属往复、活塞、单作用、风冷移动式空压机，是为需要气源纯净和环境要求较高的部门而设计的。

Writing as the highest structurating, orientating and codifying action realised on a surface is submitted here to some processual modifications who are still, calligraphic, but simultaneously obey a Pair of principle.

在书写的之前，它是空无的，这是一种欲望，因为还没有开始；书写之中也是空无的，因为正在发生，无法分离其中的线条与笔法；书写的结果同样也是一种空无，因为已经结束，因为没有任何证据表明过程的所有发生的可能。

Post-mining or gob preventive injection, sand-filling or sealed separation in the gob with potential spontaneous fire, Visional judgement or index jndgement for prediction, nitrogene-injection for fire prevention, and control, spraying oxidation retardent to delay coal oxidati...

同时提出某些预防煤田自燃发火的对策——采后或采空区预防性注浆；对可能产生自燃火灾的采空区注砂或充填，加以封闭隔离；采用直观判断、指标判断等方法进行预测预报：注氮防灭火；喷涂阻化剂以延缓煤氧化；选择合理的开拓方式和回采方法：选择合理的通风系统和利于防火的通风方式；控制向采空区的漏风等。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。