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Calculate the mean value of the torsion strength of the wire and the standard deviation of the standard deviation of the torsion strength σ_B=1800219501650=+N/mm2 the torsion yield limit of the wire τ_s=0.4537×σ_B=0.4537×1800=816.66N/mm2 variation coefficient C1=017.0180025= C2 ......
The newly renovated houses often have the smell of various pungent chemical materials such as Tianna water. They should not be parked immediately. They should be ventilated and scented as much as possible, but they should not open all the doors and windows for ventilation, because this may giv ......
It is said that the bathroom represents the quality of life of the occupants. If even the most hidden space can be made impeccable, other spaces will naturally be more perfect. The details of the need to take care of the bathroom are obviously more, in addition to the basic part, there are mor ......
The reporter learned from the Henan Provincial Development and Reform Commission that Henan will form an important national aviation hub, railway hub and highway port hub as soon as possible by promoting the construction of a modern integrated transportation system, and by intensive cooperati ......
Abstract Haien Saw Industry Co., Ltd. was established in 2000. It is a modern manufacturing enterprise specializing in the research, production and sales of sawing technology. The leading product of low noise circular saw blade matrix has been exported to Russia while occupying the domestic m ......
Abstract Zhengzhou Diamond Precision Manufacturing Co., Ltd., located in Zhengzhou Economic and Technological Development Zone, is the only high-tech enterprise in China that has established national standards and industry standards for superhard tools. Such a company had less than 60 patents ......
The White Paper issued by the General Administration of Quality Supervision, Inspection and Quarantine on June 27th, "The Quality of China's Import and Export Battery in 2012" shows that lithium-ion batteries have potential safety hazards in the import an ......
Abstract Russian oil company president Xie Qin said that the company will receive a $2 billion loan from China to increase exports to China. The increase in exports will begin this year, reaching a maximum of 31 million tons per year. He told reporters: "The principle agreement on the ex ......
Abstract Industry experts pointed out that the current international economic situation is becoming more and more complex, and China's manufacturing industry is facing many challenges. Meanwhile, the Chinese government attaches great importance to the strategic position of the manufacturi ......
Floor heating, also known as geothermal floor, is mainly used for home laying in geothermal environment and part of commercial floor decoration. At present, there are several types of wood flooring in the market, and there are solid wood composite flooring for floor heating, followed by laminate flo ......