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The results in Table 6 show clearly that the most important environmental impacts are caused by the materials of steel production.
Improvements may also be achieved by producing district heating pipes from other materials.
Journal of HVAC, 2005, 35(4): 18-21
Journal of HVAC, 2004, 34(7):93-96
Journal of HVAC, 2007, 37(5): 58-60.

Sand blasting is cheaper process but it takes longer time to clean the molds and in long run tends to damage the mold due to the usage of high velocity fine materials [3, 4].
Materials and Methods Latex compounding.
Journal of Reinforced Plastics and Composites, (2009) 1245-1254
Journal Science, (2008) 141-149
Journal of Polymer Testing, (2002) 565-569.

After the experiment, the corrosion products are removed from the surface with a non-abrasive material, and when studying samples with protective films - with a strong water jet; then the samples are dried without access to air and wiped dry with filter paper.
Alfantazi, Modeling corrosion reactions of steel in a dilute carbonate solution, Journal of Materials Engineering and Performance. 25 (2016) 601-610
Cheng, Passivity and pitting corrosion of X80 pipeline steel in carbonate/bicarbonate solution studied by electrochemical measurements, Journal of Materials Engineering and Performance. 19 (2010) 1311-1317
Alfantazi, Modeling corrosion reactions of steel in a dilute carbonate solution, Journal of Materials Engineering and Performance. 25 (2016) 601-610
Godunov, Materials science and corrosion protection: Study of calcium and iron carbonate dissolution kinetics in order to resolve corrosion problems in carbonate solutions, Chemical and Petroleum Engineering. 50 (2014) 605-609

Brief detail of tooling system Tooling Materials and Specifications Cathode gear Fabricated by clubbing a copper gear with a bakelite gear and undercutting the profile of copper gear to provide inter-electrode gap (IEG) to prevent short-circuit Honing gear AISI 1040 gear with nickel-chrome abrasive coating; particle size: 50-75µm, layer thickness: 100-150 µm Workpiece gear AISI 1040, 16 teeth, 5 DP straight bevel gear Workpiece Selection.
Singh: Experimental Investigation of Precision Finishing of Spur Gears by Pulse Electrochemical Honing (PECH) Process, International Journal of Machining and Machinability of Materials, Vol. 11 (4) (2012), p. 405-417
Misra: Parametric optimisation of ECH of spur gears by Taguchi technique, International Journal of Materials and Product Technology, Vol. 43 (1-4) (2012), p. 84–101
[6] Davis JR (2005) Gear Materials, Properties, and Manufacture.
Malik: Manufacturing Science (East West Press, New Delhi 2010)

After calcination of raw materials processing and hydrothermal synthesis experiment, the reaction conditions were SiO2 /A12O3= 3; Na2O /SiO2 = 1.9; H2O /Na2O = 40; the ageing time for one day; adding the amount of seed for 10% of the total production.
* Foundation Item :National Science Foundation of Tianjin(10JCZDJC24100) References [1] Howell P H, Acara N A, Towue M K Jr, Brit.
Chingse Journal of Inorganic Chemistry. 24 (2008) 235-240
Journal of Yunnan University. 27 (2005) 200-205
Journal of Inorganic Materials. 14 (1999) 321-331.

The contact fatigue strength of gear materials[J].
Journal of Solids and Structures, 1968 [5] Prager, W. & Taylor, J.E.
Journal of AppliedMechanics, 1985, gs(1) [6]Fleury, C. & Sander, G.
Structural Dynamics and Materials Conference, 1978 [8] ZHAO Youhong etc.
Natural Science Journal of Xiangtan University.

In graphic design, material collecting is the key task to capture relevant design materials according to 3D model design needs.
Zhejiang industy university Journal ,2007,35(2):156-158
Hubei Agricultural Science,2010,49(9):2237-2240
Layman MFC(The 2nd edition).Wuhan:Hua Zhong university of science and technology press[M],1999
International Journal of Image and Graphics, 2006,6(1):1-21

They are key factors to maintain material cycle, provide energy, and affect the whole function of wetland directly[5].In natural wetland environment that having a distinct material gradient, the change of microbial community structure can effectively reflect the soil and vegetation characters.
Material and Method A.
Journal Environmental Science. 2009, 21(7): 933-939
Journal of Contemporary Water Research & Education, 2006, 134: 9-18
Environmental Science＆ Technology, 2009, 32(10):13-18

Titanium powder (elastic modulus: 120000Mpa, Poisson's ratio: 0.3) is the chosen material for this study, because it has good biocompatibility and corrosion resistance.
Acknowledgements This study was supported by National Natural Science Foundation of China. (50972086) and the Science & Technology Project of Xianyang Shi (2010K15-04).
Vacanti: Tissue engineering, Science 260 (1993), p. 920–926 [2] J.
Griffith: Tissue Eng 7 (2001), p. 557–572 [3] Chen Zhongzhong and Li Dichen: Journal of Mechanical Engineering, Vol.39 (2003): p.144~148.
(in Chinese) [4] Cai Shengyong and Xi Juntong: Journal of Mechanical Engineering, Vol.45 (2009), p.297-304.

China 2School of Materials Science and Engineering, Henan University of Technology, Zhengzhou, Henan,450001, P R China alihongfang1976@163.com, bgldrmj@126.com, cyi_xia@haut.edu.cn Keywords: High performance concrete, Mineral admixtures, Compressive strength Abstract.
Introduction The introduction of mineral wastes into concrete is an effective way for materials and energy saving.
Experimental Materials and Test Methods.
While specimen ST2 demonstrates small amount of slender thread materials, which may be C-S-H (I) gel.
Journal of Wuhan University of Technology-Materials Science Edition Vol. 25 (2010), p. 328 [4] Z Sawicz and S.S.Heng.