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The oversharp cutting edge and inhomogeneous workpiece materials are reasons of tipping.
Acknowledgments The author wishes to acknowledge the support of the national natural science foundation of china (№.50875026) and the doctoral starting fund for scientific research projects of HIST (№.20070033).
Krishnamurthy: International Journal of Advanced Manufacturing Technology, Vol. 23 (2004), p. 240 [3] Zhang Deyuan, Wang Lijiang: International Journal of Machine Tools & Manufacture, Vol. 38(3), (1998), p.165 [4] H.
Shih: International Journal of Machine Tools & Manufacture, Vol. 47, (2007), p.1636 [7] X.
Tao: Journal of Materials Processing Technology, Vol. 148(2), (2004), p.239 (a) Clearance face and chisel edge Clearance face Rake face Marginal point Tipping Built-up edge (b) Rake face and marginal point Fig. 4 Wear and breakage of twist drill for vibration drilling （n=3600rpm, fr=0.04mm/rev, f=60Hz, A=16.5µm） Desquamation

Construction and Building Materials Vol 23(2009), p. 3112
Applied Clay Science Vol 18(2001), p.285
Journal of Colloid and Interface Science Vol 332(2009), p. 145
Materials Research Bulletin Vol 45(2010), p.878
Journal of Materials Processing Technology Vol 191(2007), p.347

It is all about materials that are exposed when using higher stresses.
The methods are well known. [1] We divide them into thermochemical, thermal and mechanical. [2] In some cases it is necessary to test the procedures for new materials eventually the unconventional materials, including in some cases, PM materials.
Recently, these materials are used in cases of fatigue stress, resp. rolling contact fatigue stress.
Buvanashekaran: International Journal of Surface Science and Engineering, Vol. 5, 2011, No. 2-3, p. 131-151, DOI: 10.1504/IJSURFSE.2011.041398 [3] S.
Kwok: Journal of Engineering Materials and Technology, Transactions of the ASME, Vol. 125, 2003, No. 4, p. 372-377 [4] B.

In the process of groundwater circulation, the chemical composition of water continuously exchange with materials of the atmosphere, lithosphere and biosphere, the isotopes may also decay or fractionate with environmental materials.
Journal of Jilin University(Earth Science Edition), 2006, 36(3):391-398
Journal of Jilin University(Earth Science Edition), 2007,37(03)
Journal of Jilin University(Earth Science Edition), 2007, 37(2):254-260
Journal of Jilin University(Earth Science Edition), 2007, 37(03)

The ash generated from combustor is processed to building materials[3,4].
The streamlined production (refining shale oil, chemical industry production, power generation, metal building materials, etc.) is analyzed in [5,6].
Qian: Journal of Jilin University (Earth Science Edition), Vol. 36 (2006), pp. 877-887
Liu: Journal of Jilin University (Earth Science Edition), Vol. 36 (2006), pp. 892-898
Zheng: Journal of East China University of Science and Technology (Natural Science Edition), Vol. 32, No. 7 (2006), pp. 801-805.

Materials and methods Samples Samples were got from a liquor storage pool after anaerobic fermentation from cattle dung at Science and Technology Park of BeiNong in Beijing on 28, September, 2013.
Subsequent processing Progress and Prospects of anaerobic fermentation broth[J].Modern agricultural science and technology journals,2011,(9):281-284
The use and precautions of Lovibond COD multi-parameter water quality tester [J].Journal of analytical instruments, 2013, 3: 66-69
Journal of Environmental Chemistry and Ecotoxicology Vol. 5(1), pp. 7-16, January 2013
Chan,YS..Physic-chemical treatments for removal of recalcitrant contaminants from landfill leachate[J].Journal of Hazardous Materials B 2006,129: 80-100

Materials and method Materials.
Acknowledgment This work was supported by the National Natural Science Foundation of China (No. 51008322), Natural Science Foundation Project of Chongqing (2010BB 5309), the State Key Laboratory of Pollution Control and Resource Reuse (PCRRF10001), Foundation of Chongqing Educational Committee (KJ100803) and the key discipline project of Chem.
Journal of Environmental Sciences 21: 827-833
Journal Of Bacteriology 187: 4665–4670
Journal of bacteriology 187: 4303-4305

Multilayer contour of agricultural goods and materials is got by using slice image processing technology, through the three-dimensional modeling software loft agricultural material entity model, this method to obtain the solid model of agricultural materials is very close to the true material model, this model which is used to analyze the stress, deformation of materials by application of finite element software is reflected more than the real.
Based on the finite element model of agricultural materials on stress distribution, with real data of agricultural material force in the harvest, storage, transport process of the size of the force and application part, and provide a theoretical reference for the design of harvesting parts of agricultural materials.
Jin, et al: Chinese agricultural science, vol. (2005) no. 2, p. 358-362.
Xie, et al: Chinese agricultural science, vol. 42 (2009) no. 1, p. 198-203.
New York: Gordon and Breach Science Pub, 1986. 154-169.

Test Materials and Test Method 1.Test Materials.Ⅰ42.5 Portland cement of Yunnan guozi cement factory; Unburned kaolinite coal gangue of Yunnan laibing coal mine, chemical composition as shown in table 1; Carbon powder, M mineral powder and Asbestos sheet.
[6] Gu Bingwei, Wang Peiming: Research on Interaction Between Coal Gangue and Cement in Thermal Activated Coal Gangue-Cement System, Materials Review, 22（7）,(2008), p139-142
[12] Zhu Beibei, Yang Quanbing: Study on Surface Thermal Activation of Coal-Gangue, Journal of Building Materials, 9（4）, (2006), p 484-487
[16] Peelamedu R D, Roy R, Agrawal D K: Anisothermal Reaction Synthesis of Garnets, Ferrites and Spinels in Microwave Field [J], Materials Research Buletin,36 (2001), p 2723-2739
[17] Guo Wei, Li Dongxu, Chen Jianhua, et al: Changes in Minerial Composition and Structure of Coal Gangue During Heat Activation, Joural of Materials Science and Engineering, 26（2）, (2008), p 204-207

In addition, it can distinctly measure diamagnetic materials like limestone, quartz and also water.
Journal of Geophysical Research 1975, 80(35): 4805-4808
Earth and planetary science letters, 1998, 164(3): 617-626
Magnetic particle hyperthermia: nanoparticle magnetism and materials development for cancer therapy[J],.
Journal of Physics: Condensed Matter, 2006, 18(38): S2919