The fire fight system of this design be hadanyplace and all by the fire bolt the system to constitute, and the fire bolt the system to guarantee the indoors three water pillars arrive at the same time, and the fire bolt the system to be pumped by water the ～ water tank to unite to supply water, fire fight tube adoption steel pipe.the hot water system, its tube of building the the adoption the steel pipes.

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The residual gas pressure in an electron tube can be measured when the tube itself is operated as a hot cathode ionization gauge.Usually,its sensitivity K is determined by the method of gauge calibration.In this paper,author try to determine the sensitivity K by ca- lculation.The formulae for this purpose have be found out,and are used for both plate and cylindrical electrode systems.

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In order to save water and reduce polluted water discharge,we use elliptical tube in rectangular steel fin tube which is treated in hot dipping zinc and use force cooling by blast axial flow fan to condensate the air in tube then return the condensate to boiler to form a closed circuit ,thus replace conventional water cooling tower.

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A fiber plastic tube with infiltration resistance membrane is dipped with composite resin to form a composite flexible tube, than the tube is turned inside out by hydraulic pressure and, as a lining, adhibited on inner wall of an old pipeline.

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Experimental results indicate that the B/A value greatly affects the internal Nusselt number and friction factor of the twisted tube because the parameters decrease with the increase of B/A and S/d values, more rapidly with the former, and that the Nusselt number and friction factor of the twisted oblate tube increase respectively by 30%~150% and 20%~50%, as compared with those of the smooth tube at the same Reynolds number and Prandtl number.

實驗結(jié)果表明：高扭曲比螺旋扁管的管內(nèi)努塞爾數(shù)和阻力系數(shù)均隨B/A值和S/d值的增大而減小网色网站大全cao，但隨B/A值的增加而減小得更快，B/A值對高扭曲比螺旋扁管的管內(nèi)傳熱與流阻性能影響更大久久久久囯产；在相同雷諾數(shù)和普朗特數(shù)下日韩AⅤ网站免费怎么看，高扭曲比螺旋扁管管內(nèi)的努塞爾數(shù)為光滑管的1.3~2.5倍；阻力系數(shù)為光滑管的1.2~1.5倍亚洲欧美另类精品一区。

The experimental results indicate that, over a ranger of tube side Reynolds number and Prandtl number (Re=4000~20000, Pr=6~7.5), the internal Nusselt number and friction factor of spiral-flat tube increased by 30%-150% and 20%-50% respectively compared with smooth tube at the same Re and Pr. The value of friction factor decreases with increasing the value of B/A as well as increasing that of S/de, and the same phenomena can also be observed for Nusselt number.

實驗結(jié)果表明：管內(nèi)Nu和f值均隨均隨B/A值和S/de值的增大而減小人人插人人操大肉穴免费毛片，但隨B/A值的增加而減小得更快，B/A值對螺旋扁管管內(nèi)傳熱與流阻性能影響更大黄视频毛片；在相同Re和Pr下久久三级你懂视频，螺旋扁管管內(nèi)Nu數(shù)為光滑管的1.3～2.5倍；阻力系數(shù)f是光滑管的1.2～1.5倍。

The result showed Indomethacin inhibited the formation of germ tube and hypha of candida albicans by dose dependence: indomethacin can inhibit 50% germ tube formation at 0.75mM level, while it can fully inhibit germ tube formation at 2.0mM level.

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The real shape of U tube was considered, and heat transfer model of underground vertical buried tube heat exchanger was built with math methods and numerical analysis software. The soil temperature distributions around the buried tube under different working conditions were solved by programming.

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The simulated results showed that in cooling tube the thermophoresis force had removing effect on the diesel engine particles,and it is possible to increase the deposition efficiency of diesel engine particles in cooling tube by rational design and control of the cooling tube structure and working parameters.

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Allthe models satisfy the precision and strength requirements.6 CFD is employed to simulate the application of tube with static mixer in anindustrial furnace, in which a tube model library containing the geometricalmodel and physical model in common use is build.7 Disturbed flow in tube with static mixer is demonstrated in an experimentsystem designed and manufactured by the author. Fluid field is measured byuse of seven-hole probe method. An experimental system are designed and builtfor this purpose.

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