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The hardness test of the base material and welded joint of pipe body was also carried out.
It is suggested to control the reinforcing and anti-corrosive materials and processes of pipes effectively and carry out quality inspection strictly.
Corrosion Science and Protection Technology, 2004(6): 367-370, 374
Journal of iron and steel research，2015, 27(3): 60－64
Oil & Gas Journal, 2015, 34(9)973-977.

The reason for this is that the single parts are transported as stacked, unsorted bulk material.
Being contact surfaces, both areas are exposed during the stacking of bulk material, and are subjected to higher forces than in the remaining, and simultaneously more rigid, component areas.
Ackert, Improving surface based clamping simulation by measuring the position of active surfaces during the clamping process, ESAFORM (2012), Key Engineering Materials Volume 554-557
Ceglarek, Impact of Fixture Design on Sheet Metal Assembly Variation, Journal of Manufacturing Systems Vol.23/No.3, 2004
Yuan, Deformable sheet metal fixturing: principles, algorithms and simulation, ASME Journal of MFG Science and Engg.

Introduction Catalytic material and relative sensitive components are one of the international hot research fields.
Composite material Al2O3 is modulated to pulp by Nitric acid and uniformly coated on the micro twin-bridge thermal resistors.
Acknowledgement This research is supported by National Science Fund (60971020) and “863” National High-tech Research Development Project (2006AA040101).
Chinese Journal of Sensors and Actuators, 19(2006) 2136-2137
Journal of Functional Materials. 36(2005) 454-456.

A Practical Calculation Method of P-Δ Effect in Frame Structure Shuzhi Liu a, Xiaoyan Guo b Inner Mongolia University of Science and Technology, Baotou 014010, China ankdlsz@sina.com, bgxy.jiang@yahoo.com.cn Keywords: Frame Structure; P-Δ Effect; Practical Calculation Method; No-Shear Moment Distribution Method; Correction Factor Abstract.
The second-order nonlinear analysis of considering the material non-linearity and geometry non-linearity are a comprehensive analysis method, the results are consistent with the actual situation.
Through the discount of the flexible stiffness reflects the nonlinearity of material, the calculations are the geometric nonlinearity method.
Journal of building structures, 2008, 29-5:114-119.
Journal of building structures, 1991, 12-5: 42-46.

Experiment Materials and Methods Experiment Materials.
[2] Chungui Du, Chunde Jin, Zhikun Liu, 2004, "The ways of deep-processed of bamboo resources in China", Journal of Agricultural Science Yanbian University, Vol.26, No.1, pp.50-53
[3] Renjie Zhao, Chungui Du, 1999, "A Study of the Processing of Radial Bamboo Composite PanelⅠ.Preventing the Radial Bamboo Strip(orBlock) from Deformative Shrinkage", Journal of Central South Forestry University, Vo1.19, No.4, pp.22-25

Introduction There are many advantages with aluminum alloy such as small weight, good anti-corrosion, wonderful ductility and extrusion, thus this material has been put in use in construction broadly.
Journal of building structure, 2006,27（5），9-15(In Chinese)
Aluminium structures[M].London and New York: Elsevier Applied Science,1987
[3]ECCS.European Recommendations For Aluminnum Alloy Structures[S].FIRST edn.1978 [4] National code, GBT228-2002, Extending Test Method of Metal Material under Normal Temperature, China NSO Committee, 2002(In Chinese)
Journal of building structure,2007，2,8（6），136-146(In Chinese).

Energy Materials and Solar Cells. 93 (2009) 14611470
Umeno, Diamond and Related Materials. 15 (2006) 6
Liu, Diamond and Related Materials. 17 (2008) 1927-1932
J, Diamond and Related Materials. 4 (1995) 297-301
Umeno, Diamond and Related Materials. 15 (2006) 371-377

Because our basic science and technology fall behind other countries, wide-ranging developing occasion doesn’t occur.
Chinese Journal of Applied Mechanics,2004,21(21)(in Chinese) [18] Fang Cunguang, Wang Wei.
Journal of System Simulation, 2004,16(11)(in Chinese) [20] Wang Haifeng, Song Bifeng, Wang Haiping.
Journal of System Simulation, 2006,18(5)(in Chinese) [24] Chen Lan, An Jingwen, Yang Changwei.
Journal of Projectiles, Rockets, Missiles and Guidance, 2007(2)(in Chinese) [28] Ou Yangjin.

Materials and Methods 1.1 Experiment site Long-term experiment site is located in Jilin Province - Gongzhuling City (43 o30' N, 124o48' E, elevation 220 m).
Chinese Journal of Ecology 2008,27(6): 911-915(In chinese)
Chinese Journal of Soil Science,2005,36(5):659-663 (In chinese)
European Journal of Agronomy, 2013, 45: 20–26
Plant Nutrition and Fertilizer Science,2000(In chinese)

Materials and Methods Experiment materials The Potamogeton crispus used in the experiment was collected from outdoor natural ponds in Zhabei District, Shanghai.
In suspension group, 400g of sediment were added to the 2000mL graduated cylinder, using polystyrene foam packaging material as a fixed matrix and planting five selected top branches of Potamogeton crispus. 1200mL distilled water was injected into each cylinder slowly by siphon, avoiding disturbance of sediment.
Acknowledgments This work was supported by the National Natural Science Foundation of China (20677038) and Innovation Found of Shanghai University (SHUCX102265).
Journal of Freshwater Ecology. 2004,19:279-284 [5] Te Cao, Ping Xie, Leyi Ni, Meng Zhang, Jun Xu.Carbon and nitrogen metabolism of an eutrophication tolerative macrophyte,Potamogeton crispus, under NH4+ stress and low light availability.Environmental and Experimental Botany,2009,66:74-78 [6] Gao Jingqing, Xiong Zhiting, Zhang Jingdong.Phosphorus removal from water of eutrophic Lake Donghu by five submerged macrophytesa.Desalination,2009,242:193-204 [7] Ozkan Korhan, Jeppesen Erik, Johansson Liselotte S.
Canadian Journal of Fishery and Aquatic Sciences,1989,46:435-439