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As key components during the process of gas being gathered via casing, gas tight premium connection’s thread and sealing surface processing have higher requirements, which need to adopt numerical control lathe processing.
In addition, the influence caused by material, quantity and the quality requirement, etc, all need to be thought comprehensively to determine machining process.
Chinese Journal of Mechanical Engineering,2005,41(3):216-220 [2] Li Fei,Zhongyuan, Li Yumin, Zhang Feiyue.

Mathematical Simulation of Membrane-Absorption for H2S Capture From nature gas* Ma Lu, Wang Shu-li, Wang Jian, Li En-tian, Cao Xin (Chang Zhou University, Jiangsu Key Laboratory of Oil and Gas Storage and Transportation Technology, Jiangsu Changzhou 213016, China) * Corresponding author: Ma Lu; Email address: malu061@126.com; Fund Project: CNPC Innovation Foundation(2012D-5006-0604), Hall of Jiangsu province science and technology(BY2011127,BY2012095) Keywords: Membrane-absorption; Hydrogen sulfide; Simulation; Mass transfer Abstract: A dynamic model of mass transfer was developed with mass transfer equation and mass transfer differential equation according to two film theory for the simultaneous transport of hydrogen sulfide through hollow fiber membrane (HFM) contactors while using N-methyldiethanolamine (MDEA) as the chemical solvent.
Material corrosion factors of ground gathering line in high sulfurous environment, Natural Gas Industry, 24 (2004) 122-126
Simulation for CO_2 absorbed in hollow fiber membrane absorber, Journal of Chemical Industry and Engineering (China), 54 (2003) 1563-1568

Thermal analysis of edge illumination type LED backlight with heat pipe Wohuan Guan1, a, Yong Tang1,b* , Xinrui Ding1c, Bin Liu1, Longsheng Lu1 1Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes, South China University of Technology,Guangzhou,510640,China ashiningfoon@foxmail.com, bytang@scut.edu.cn, cdingxinrui-1987@163.com Key words: Thermal analysis, LED-Backlight, Heat pipe Abstract.
Sung Ki Kim[7] explored the effects of composite conductivity of MCPCB, thermal interface material and fixture on the junction temperature of LEDs and temperature uniformity of the LED backlight unit.
[8]Mingyan Liu, Daming Wu:2011 International Conference on Electric Information and Control Engineering(Wuhan China, 2011), p 277-280

Material and methods Main reagents.
Acknowledgments This work was supported by the National Key Technology R&D Program (2012BAK13B05).
References [1] GB 50028-2006 Cole for design of city gas engineering, China Architecture & Building Press, 2006

Because the construction and development of new city will rely more on the expansion of urban size, this will take up a lot of land and consume large amounts of water, energy and other material resources.
The key to problem is whether China's urbanization could take the road of sustainable development.
Of course, the sustainable development of city is a long-term and complex socio-economic systematic engineering.

Effect of Adding Cattle Dung on the Slurry Ability of Biomass Coal-Water Slurry Yu Guoa, Qianlin Chenb and Dapeng Weic School of chemistry and chemical engineering, Guizhou University, Guiyang, China, 550003 a gy1988@yeah.net, b cql1018@163.com, c guoyingnet@126.com, Keywords: Coal-Water Slurry, Cattle Dung, Slurry Ability, Adding Amount, preparation conditions Abstract.
For preparing the best cattle dung CWS and keeping the calorific value of CWS, the adding amount and adding way of the cattle dung as raw material in the new biomass CWS the is researched, and the ratio of dung, water, coal and additive is confirmed.
As the research [15-17], we known that ratio of additives is a key for slurrying.

(9) The material of the sample container must be compatible with the sample itself.
Safety is a key feature of these sensitive oils.
References [1] Jeffries, A. and Ameye, J. (1998), “RULER™ and used engine oil analysis programs©” Lubrication Engineering, Vol. 54 No. 5 pp. 29-34

Fig. 1 The investigation of the status of green fields in urban parks In this process, there is a key part of a few particularly noteworthy: (1) Select the type of sensing time and photograph due to a natural phenomenon of a certain periodicity, the type of plant growth, the detector senses the presence of the corresponding data also are differences, determining the appropriate time to photograph extraction the efficiency and accuracy of data has a significant role.
Conclusions In urban green fields planning and construction process, when it is combined with the use of GIS and RS technology, it has access to timely and accurate information, mapping fast, high utilization data, high efficiency and other obvious advantages objective planning and advanced technology can save a lot of viable 8 human and material resources, which will produce a wide range of social and economic benefits.
[2] Yan Li: Photogrammetric Engineering and Remote Sensing, Vol. 54 (1988), No.11, p. 1593-1600

Toxicity of pH, Ammonia and Volatile Fatty Acids on Hydrogenotrophic Methanogen-Enriched Sludge Jianzheng Li1,a, Yupeng Zhang2,b, Chong Liu2,c and Zeyu Tang2,d, 1State Key Laboratory of Urban Water Resource and Environment, 2School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, China aljz6677@163.com, bccfzyp@gmail.com, chit_liuchong@hotmail.com, dtzy1118@foxmail.com Keywords: Methanogen, Anaerobic digestion, Toxicity, Ammonia, Volatile Fatty Acids.
Material and methods Hydrogenotrophic methanogen-enriched inoculum.

China 2 Key Loboratory of Natural Pharmaceutical & Chemical Biology of Yunnan Province, Yunnan 661100, P.R.
Intorduction Activated carbon commonly used as a bleaching agent, the catalyst carrier and the enrichment material of trace component.
Tian, et al.: The Chinese Journal of Process Engineering.