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The piston material is 20Ni4Mo defined by the keyword “MAT_PIECEWISE_LINEAR_PLASTICITY”.
The hammer bit material is YG8 cemented carbide defined by the keyword “MAT_ELASTIC”.
Elias: International Journal of Rock Mechanics and Mining Sciences.
Bu: Journal of Southwest Petroleum University (Science and Technology Edition).
Jing: Advanced Materials Research.

In order to make fully use of great heat generated in the blowing process and reduce the furnace temperature and the extension furnace life, the cold materials were added during the blowing process, and finally the high nickel matte which was produced during the blowing process carries on rubs floats separation processing.
Nickel calcine Quartz Coke powder Power Low nickel Quartz Cold materials Blowing Electric furnace slag (Waste) Converter slag Recurrent slag 16500kVA Ore smelting electric arc furnace（3sets） 50t Horizontal converter (4 sets) Converter slag Nickel-matte (Product) Curing agent Quartz Coke powder Power Nickel and cobalt matte Poor slag (Product) 5000kVA Slag cleaning furnace (2 sets) (Waste) Fig.1 Nickel smelting production process flow diagram Process parameters on-line monitoring system Topological structure of the system.
Jinchuan science and technology, 1995, (3): 36-42
Journal of central south university of technolgy, 2000, 31(4): 315-317
Journal of central south university of technolgy, 2000, 31(5): 458-461.

Acknowledgements This work was financially supported by National Nature Science Foundation (51075018) of China.
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Materials and Method 2.1 Materials The materials used in this study included Poly Lactic Acid (PLA) filaments, the ingredient of IBS paste including hydroxyapatite from bovine bones from PT Inobi, Surabaya, Indonesia, Gelatin (150 bloom Rousselot, Guangdong, China) from cowhide, Hydroxy Propyl Methyl Cellulose (HPMC) (Sigma Aldrich H7509, Singapore), and streptomycin sulfate in 1 gram vial purchased from PT.
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The different structures and materials make different anti-deformation capability of subgrades.It is unscientific to consider the highway destroy situation according to the standard of brick-concrete buildings because subgrade materials of highway are mostly soil or gravel and other loose materials.
The difference of structures and materials determines there is no recognized criterion to judge the subgrade of highway is safe or not.
The subgrade materials are mostly local materials as gravel soil, sandy soil, detritus and so on.
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Therefore, this paper is aimed at determining the mechanical behavior of materials in metal cutting.
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Experimental Studies Materials.
However, the increased open porosity is connected also with the increase of the absorbability of ceramic materials, which should be taken into consideration in a direct exposure of materials to atmospheric conditions.
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Series: Materials Science and Engineering 127, 012-024
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In this process, powder material is embedded as a thin layer to be sintered or melted by laser scanning.
Authors have reported that porous materials can be fabricated by this process in order to make artificial bone [11].
Precise and fine honeycomb structures of Ti-6Al-7Nb were fabricated by an improved laser forming process to develop new scaffold materials.
[7] Boyer, R., Welsch, G., and Collings, E.W., Materials Properties Handbook: Titanium Alloys, ASM International, 1994, pp.10
Powder Metallurgy & Particulate Materials (2009), CD-ROM

In numerical simulation ABAQUS, it only define the material properties of flexible body, without needing to define the material properties of rigid body, it can largely reduce the cost of calculation.
Acknowledgments The authors would like to thank the national natural science foundation of China (50765004) for subsidization.
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