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Drill breakage can easily appear because of the block up of cutting scrap, the abrupt change of material, tool wear, etc.
Duan: Natural Science Journal of Harbin Normal University, Vol. 20, No. 2 (2004), pp. 76-79
Zhang: Journal of Yantai University (Natural Science and Engineering Edition), Vol. 22, No. 1 (2009), pp. 72-75
Lv: Natural Science Journal of Jilin University of Technology, No. 4 (1999), pp. 67-71
Wu: Science Education, No. 1 (2006), pp. 52.

Acknowledgement This research was supported by National Natural Science Foundation of China (Grant No. 61173180 and 61070235).
Birgin, J.M.Martinez, D.P.Ronconi,“Optimizing the Packing of Cylinders into a Rectangular Container: A Nonlinear Approach,” European Journal of Operational Research, vol.160(1),2005,pp.19–33
“Solving circle packing problems by global optimization: Numerical results and industrial applications,” European Journal of Operational Research, Vol 191(3), 2008, pp. 786-802
“A Critical Element-Guided Perturbation Strategy for Iterated Local Search”, Lecture Notes in Computer Science, vol 5482, 2009, pp.1-12
[16] Huang Wenqi, Zeng Zhizhong, Fu Zhanghua, Ruchu Xu, “A new algorithm for packing unequal disks in a larger circle”, to be published in American Journal of Engineering and Technology Research.

The die materials used in isothermal processes must withstand significant thermomechanical stresses.
Khalifa, Thermal Oxidation Effects on Sub-Surface Microstructure and‎ Mechanical‎ Properties of Cast and Forged α/β Titanium Alloys‎, International Journal of Materials Technology and Innovation. 5(1) (2025) 50-58. https://doi.org/10.21608/ijmti.2025.436308
Viehweger, A Novel Canning Technology for Forging of Gamma-TiAl Alloys, Materials Science Forum. 546-549 (2007) 1421–1426. https://doi.org/10.4028/www.scientific.net/MSF.546-549.1421
Materials. 14(16) (2021) 4499. https://doi.org/10.3390/ma14164499
Advances in Materials Science and Engineering, 2018(1) (2018) 8701890. https://doi.org/10.1155/2018/8701890.

Many studies exploring mechanisms of antibacterial activity of nano materials.
Materials ZnO nanoparticles used in this study were purchased from NAMAGO Company and had the purity of 98 percent.
Yousefi, Water disinfection using Photocatalytic process with titanium dioxide Nanoparticles, Journal of Mazandaran University of Medical Sciences 25(122) (2015) 227-238
Suh, Manufacturing of anti-viral inorganic materials from colloidal silver and titanium oxide, Revue Roumaine De Chimie 51(11) (2006) 1121
Momba, Cost-effective filter materials coated with silver nanoparticles for the removal of pathogenic bacteria in groundwater, Int j environ res public health 9(1) (2012) 244-271

Introduction Porous carbon materials can be synthesized using various carbonaceous precursors such as coal, lignite, shell, wood and etc. via carbonization process and the synthesized materials called as active carbons [1].
However the size of pores is limited to the thickness of the wall of mesoporous materials.
Electrochemical Properties Cyclic voltammetry is an important technique to characterize the EDLC materials.
Cheng: Materials Letters Vol. 60 (2006), p. 3517 [8] K.T.Lee, X.
Li: Materials Chemistry and Physics Vol. 138 (2013), p. 484 [14] P.

Titanium thin film is widely developed and used in micro-electromechanical systems (MEMS), medical implantation, and the potential applications of smart materials[8].
This paper pioneers to utilize titanium thin film material to be the main material of the pressure compensator.
Y, DSV-specific tool-box for the deep-sea resources exploitation, Chinese Journal of Mechanical Engineering, 2003,39(11), pp. 38~42.
W, Direct pH measurement of NaCl-bearing fluid with an in situs sensor at 400℃ and 400 megapascals．Science, 1996, 272(6):l634～1636
Ying Study of the sealing characteristic of polytetrafluoroethylene-coated O-ring applied in gas-tight deep-sea water sampler Source: Advanced Materials Research, v 295-297, p 3-10, 2011, Manufacturing Science and Technology

Influence of original structure on microstructure and properties of 35CrMo steel after Zero time holding quenching Anming Li1, a, Mengjuan Hu1 1School of Materials Science & Engineering.
Experimental Material and Methods Experimental material The composition of experimental 35CrMo steel is (mass fraction, %): 0.37% C, 0.23% Si, 0.55% Mn, 0.94% Cr, 0.16%Mo, 0.01% S, 0.02% P, and the balance is Fe.
Employed in the research and study of metal science and heat treatment.
Tel: 0391-3980631 E-mail: anmingli2001@sina.com.cn Address: School of Materials Science & Engineering.
Yang, Y.Cui, Journal of Fuxin Mining Institute(natural science).10 (1994) 64-68

Experiment 2.1 Raw materials BR9000 (Beijing Yanshan Petrichemical Corporation), coupler (Nanjing Shuguang Chemical Group Company).
Horii, et al.: Applied Clay Science, 1996(11) p. 89 [5] C.J.
Shen, et al.: Journal of the Chinese ceramic society, 2008(36), p. 858 [7] W.L.
Li, et al.: Applied Clay Science, 2008(31), p. 273 [11] S.H.
Zhang, et al.: Applied Clay Science, 2005(28), p. 378

Huang et al.: Diamond and Related Materials Vol. 10 (2001), p. 1850
Zhang et al.: Diamond and Related Materials Vol. 14 (2005), p. 1361
Braun: Diamond and Related Materials Vol. 5 (1996), p. 478
Trava-Airoldi et al.: International Journal of Surface Science and Engineering Vol. 1 (2007), p. 417
[9] American Society for Testing and Materials.

Some of the advanced materials have to be replaced and unnecessary material can be deleted; Finally, we should avoid partly dismantled to reduce materials waste by taking the cooperation between constructors into account. 3.2 The allocation of cost savings Project owner (developer) is the organizer and investor of the project.
Here we discuss it according to different materials supplier.
Chinese Engineering Science, 1999,11 (1)
China's building materials industry press, 2006 (1)
Journal of fujian construction, 2012 (9) 27 ~ 29.