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It is practical significance to save a large amount of raw materials for the mass production and to reduce production costs and create higher economic efficiency.
Traditional design methods use the simplified calculation method of materials mechanics to calculate its strength.
First, the model material is determined.
The hanging seat material is a low alloy steel.
[5] Bai Qiao,Tao Chunsheng,Ma Songbai.Optimal Design of Linkage Mechanism in Food Packaging Machinery Based on Pro/E,Journal of Beijing Technology and Business University(Natural Science Edition),2011（04）p.58-63(In China).

University of Science and Technology Beijing community has contained the large-scale dormitory, the high-rise building, the GYM and so on.
And the personnel also gather fewer than the I level, so the sign’s quantity may reduce, but the material selection and the sign type should be the same with the I level sign.
Acknowledgements Supported by science and technology development fund of Ministry of Housing and Urban-Rural Development of the PRC.
Journal of University of Science and Technology Beijing，2007，29（4）：367-372(In Chinese) [5] Margrethe Kobes, Ira Helsloot, Bauke de Vries, Jos G.
Journal of Natural Disasters,,2005，14（6）:116-119(In Chinese)

., 017200, China 2 Department of Civil Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China alisanwa@yahoo.com bsunrongguan@126.com Keywords: tunnel, shotcrete lining and rock bolts, strength reduction finite element method, safety coefficient.
Duncan (1996) pointed out that safety coefficient of slope can be defined as the reduction degree of soil materials of shear strength when slope destruction just reached critical state [5].
Acknowledgements Support of the National Natural Science Foundation of China(NSFC) under Contract no.40872172 is gratefully appreciated..
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Materials and methods 2.1 Study area West Lake, a shallow and freshwater lake is situated in the west of Hangzhou city.
Zhang, Eutrophication assessment of streams in the West Lake scenic spot, Journal of Zhejiang Agricultural Sciences. 2 (2013) 202-204.
Shao, Study on the annual variations of TN and TP and the eutrophication in Hangzhou West Lake, Journal of Hydroecology, 3(4) (2010) 1-7
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Xu, Comparative study on typical river comprehensive water quality assessment methods, Journal of Tongji University (natural science), 17 (2008) 729-733

The idea of ICON therapy is to fulfill the channels in enamel with a special composite material.
Analysis of material as a mixture of interpenetrating material Mathematical models of media with solvents have evolved from conception of a material as a mixture of liquids (solid solutions) to a modeling of a system as an interpenetrating continua with internal interactions [8].
The next step of the modeling is formulation of the constitutive equations of the theory, which should apply to a selected class of materials.
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