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When concrete materials fall into the mould box just under the effect of gravity, the materials will overhead and occlude because of the nature of the materials.
So many porous may exist in the materials.
It is obvious that materials exist mass.
Journal of Chang'an University, 2007(1): 1-6
Development Guide to Building Materials，2008(3):50-54

Gear material is 45 steel with thermal refining, and accuracy class is seven.
The gear material is 45 steel with thermal refining and the contact fatigue limit stress is .
Acknowledgment It is a project supported by National Natural Science Foundation of China.
Journal of Sound and Vibration, 1989,131(2):177-196
Journal of Mechanical Design, 1990,112:237

Introduction Composite is generally composed of two or more materials whose chemical or physical properties are different.
Experimental 2.1 Materials Water-based PU from RTB Technology Co., Ltd., Thailand was purchased and used as received.
Ramdani, Polymer and Ceramic Composite Materials: Emergent Properties and Applications, CRC Press Taylor & Francis Group LLC, Florida, 2019
Kessler, Handbook of Composites from Renewable Materials, Design and Manufacturing, Scrivener Publishing LLC, New Jersey, 2017
Furukawa, The Microphase-separated Structure of Polyurethane Bulk and Thin Films, Polymer Journal, 41 (2009) 118–124

In technical sciences are descriptions for each experiment, realization of process or adequate choice of cutting tools, materials, technological conditions, cutting parameters and theirs application [15].
Some of these materials are high speed steel, cutting ceramic, sintered carbide.
Characteristics and dependences for all cutting materials are same.
Panda et al., Accompanying phenomena in the cutting zone machinability during turning of stainless steels, International Journal of Machining and Machinability of Materials 5/4 (2009) 383-400
Davis, Materials: ASM Specialty Handbook, ASM International, Ohio, 1998

As an option, full set of equipment for loading materials, cleaning and post-processing models.
Desired characteristics of parts can be achieved by using different materials for each layer.
Applied Mechanics and Materials. 379 (2013) 56-59
IOP Conference Series: Materials Science and Engineering. 1 (2014) 1-4
Japanese Journal of Applied Physics. 8 (2011) 28-32.

The low mechanical strength is the main impediment to a broader use of calcium phosphate bone cement (CPCs) as implant material.
Materials and Methods.
The material was milled in alcoholic medium (CH3CH2OH) in proportion liquid/powder 2:1 for 3 h, using alumina balls (average diameter < 10 µm).
The interlocking of these crystals is responsible for increase of mechanical strength of the material [10].
Bermúdez: Journal of Materials Science:Materials in .Medicine Vol. 4 (1993),p. 503

The Optimized Design of Manufacturing Process of Shrub Scrimber Yanfang Li1, 2, Yingcheng Hu1, 2, a, Li Zhang1, 2, Jia Yao1, 2, 3 and Jie Yuan1, 2 1 Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, 150040, Harbin, China 2 College of Material Science and Engineering, Northeast Forestry University, 150040, Harbin, China 3 College of Mechanical Engineering, Jiamusi University, 154007, Jiamusi, china.
Materials and Methods Shrub was obtained from Ordos, Inner Mongolia, China, with 56% moisture content and 5.14 PH value.
The Shrub woods were grinded repeatedly until the morphology with continuous in longitudinal and loose but matted at the transverse direction was formed, and the average thickness of these materials was controlled within 2 mm.
The materials were assembled in the mould, and the dimension of specimen was determined as 320mm×340 mm (length×width) by the mould.
“Detection of structure and density distribution of wooden floor by Computed Tomography,”Journal of Beijing Forestry University. 32(6), 109-113 (In Chinese)

Optimization of Resinification of Liquefied Products from Trash ACQ-treated Antiseptic Wood Fang Ding1,a, Yingying Qiu1,b , Zhigao Liu1,c，Qiuhui Zhang1,d 1School of Materials Science and Technology, Beijing Forestry University, 35 Tsinghua East Road, China, 10083 adingfang11@126.com, bqiuyingying987@126.com, c234775311@qq.com, dqhzh66@163.com Keywords: ACQ, Antiseptic woods, Resinification, Liquefaction Abstract.
Liquefied products from biomass have a very extensive applied foreground; because they could be used to produce adhesive, molding compounds, foam materials and carbon fiber [2-6].
Material and methods Raw material.Trash ACQ antiseptic fir was smasher and sieved, and the particle between 60-80 mesh was dried at 103 °C for 12 h before being used.
Journal of Applied Polymer Science, Vol. 8, No. 3, (2002), pp. 468~472 [6] Xiaojun Ma, Guangjie Zhao.
New Chemical Materials In Chinese, Vol. 39, No. 8, (2011), pp. 81~83

Journal Citation (to be inserted by the publisher ) Copyright by Trans Tech Publications Neural Cells on Iridium Oxide I-S.
Cui8 1 Atomic-scale Surface Science Research Center, Yonsei University, Seoul 120-749, Korea.
inseop@yonsei.ac.kr 2 Department of Medical Engineering, Yonsei University College of Medicine, Seoul 120-752, Korea 3 Korea Institute of Machinery & Materials, Chang-Won 641-010, Korea 4 Korea Institute of Ceramic Engineering & Technology, Seoul 153-023, Korea 5 Department of Electronic Engineering, Kangwon University, Kyungnam 200-701, Korea 6 Bioengineering Research Center, Sejong University, Seoul 143-747, Korea 7Department of Biomedical Engineering, Inje University, Kyungnam 621-749, Korea 8 Department of Materials Science & Engineering, Tsinghua University, Beijing 100084, China Keywords: Neuron, Iridium oxide, charge injection, e-beam evaporation, ar ion beam, stimulation Abstract.
Iridium oxide was investigated as a material for the stimulating neural electrode.
Materials and Methods Iridium was deposited on either Si wafer or silicone rubber plate.

Anti-icing properties of superhydrophobic poly (vinyl chloride) coatings Zhiqing Yuan1,a, Xian Wang1, Jiping Bin1, Qilong Liu1, Haiyun Jiang1, Dejian Zhao1, Ruomei Wu1, Hong Chen2,b 1 School of Packaging & Materials Engineering, Hunan University of Technology, Zhuzhou,Hunan,412007, People’s Republic of China 2Central South University of Forestry & Technology, Changsha, Hunan, 410004, People’s Republic of China aemail: byxy2001@163.com, bemail: chenhongcs@126.com Keywords: Coatings, Superhydrophobic, Anti-icing Abstract.
It means that the sliding angle is very important for the anti-icing property of superhydrophobic materials or coatings.
It indicates that the ultra-low water sliding angle is necessary for superhydrophobic anti-icing coatings or materials.
Acknowledgments The authors thank the support of the Natural Science Foundation of China (No. 51103036), Youth Foundation of Hunan Educational Committee(No.11B035), Natural Science Foundation of Hunan province (No. 10JJ4033), and Science and Technology Planning Project of Hunan Province (No. 2010RS4011) References [1] S.
Tang, Journal of Porous Materials, vol.16 (2008) , p.447.