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Introduction Polymer materials are widely used in human life.
These materials bring convenience to life, but also bring problems to the environment.
Materials and Method Materials. 1,4-bis(bromomethyl)benzene (97%), vanillin (98%), potassium carbonate (99%), diethylenetriamine (DA) (99%), tris(2-aminoethyl)amine (TA) (96%) and N,N-dimethylformamide (DMF) (99.8) were purchased from Echo Chemical co., Ltd.
Leibler: Science.
Lehn: Journal of the American Chemical Society.

Experimental Program Materials.
International Journal of Concrete Structures and Materials, 10(3), 271-295
Construction and Building Materials, 99, 73-81
Materials Today: Proceedings, 4(9), 9758-9762
Engineering Science and Technology, an International Journal, 20(2), 536-541

(2) Screw φ32 mm, trapezoidal thread, the pitch diameter φ29 mm, and screw pitch 6 mm, material 40 Cr with a length of 1000 mm
(5) Road wheel is directional wheel with universal casters, model (series 4 - flat type - activity type), wheel diameter φ125 mm, number: 4404761, materials for super polyurethane (black), wheel width 50 mm, bearing 420 kg, installation height 350 mm with quality 2.29 kg [4].
:L2012232), and the Twelfth Five-Year Rural Areas National Science and Technology Plan subject (grant No.:2011BAD20B09-10).
Material mechanics (4th Edition) [K] Beijing: Higher Education Press, 2004
Journal of Shenyang Engineering College, 2010, 6 (3):271-273

The common grid of material is among 0.4 mm -0.8 mm.
Building material model.
Material of the wheel hub is SPCC-SD; the properties are shown in table 1.
Acknowledgement The financial Support of Shenzhen Plan for Science & Technology (No.JC200903180641A) is acknowledged.
Metal Working Technology(2008) No.8, p.80-82 [4] Zhou jie, Hu jianjun: Chinese Mechanical Engineering Vol.14 (2003) No.1, p.20-22 [5] VIKRAM V, BRAD K: Journal of Engineering Materials and Technology(2003) No.4, p.125-131 [6] Liu Yuqi, Li Zhigang: Acta Mechanica Solida Sinica.(2004) No.17, p.58-64 [7] F.K.

Materials and Methods Materials Chemicals.
Yoshimura: Journal of Materials Research Vol. 13 (1998), p. 94
Ray: Materials Letters Vol. 60 (2006), p. 218
Price: Annual Review of Materials Science Vol. 29 (1999), p. 295
Huang: Materials Letters Vol. 59 (2005), p. 1902

Study on preparation of solid concrete brick with recycled aggregate Qijin Li, Guozhong Lia, * Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, School of Materials Science and Engineering, University of Jinan, Jinan, Shandong, 250022, China amse_ligz@ujn.edu.cn, *correspondence author Keywords: Construction waste, Recycled aggregate, Solid concrete brick, Water cement ratio.
Waste clay brick and waste concrete were the main part in construct waste and through sorted, crushed, screened and classified, they could be made into recycled aggregate to become raw material of building materials, which could not only solved construct waste disposal problems, but also reduced natural sandstone exploitation, so it had important social and economic benefits [2,3].
Experimental Experimental materials.
Secondly the iron materials, wood materials and organic material in construction waste were removed by magnetic separation and pneumatic separation, and then the construction waste particles with a size of 5~40mm was obtained by screening and those construction waste particles whose size was less than 5mm were mainly clay particle and cement mortar particle and it would be removed.
Zhang: Journal of Building Materials, Vol. 6 (2003) No.1, p.100.

Materials and Methods 24 monitoring stations have been designed in Luanhekou-Beidaihe ecological monitoring marine (Fig.1).
Journal of nanjing normal university (natural science edition),33,3(2014)124-131
Journal of Coastal Research,82,s1(2018)218-223
Marine Environmental Science,35,1(2015)70-75
Marine Environmental Science,35,4(2015)499-502

Materials and Methods 1.1 Experimental Apparatus Experimental apparatus used in this study was a biotrickling filter, which was made of organic glass with 50mm inner diameter and 600mm height, including desulfurizer of 350mm height, effective volume of 0.687L.
Journal of Tianjin Urban Construction Institute, 2001, 7(2): 105-108
Chemical Engineering Journal and the Biochemical Engineering Journal, 1995, 58(1): 71-79
International Journal of Hydrogen Energy, 2009, 35(7): 2722–2726
Chemical Engineering Journal, 2002, 87(1):101-110

Journal of Structural Engineering-ASCE, 1999. 125(4): p. 410-416. 3.
Journal of Sound and Vibration, 1994. 169(1): p. 3-17. 4.
Journal of Engineering Mechanics-ASCE, 2002. 128(1): p. 7-14. 5.
Journal of Smart Structures and Systems, 2008.
Smart Materials & Structures, 2001. 10(3): p. 441-445.

II.Materials and Methods A.
Chinese Journal of Health Statistics, 2005,4: 28-31, 41
China Journal of Chinese Materia Medica. 2008,33 (2) :218-220
China Journal of Chinese Materia Medica. 2008,33(1): 218-220
Chinese Journal of Cell Biology. 2004,26(1): 89-92