What is the most important thing for people in the 21st century? economic development? Increase production efficiency? Technological progress? Different issues will have different answers in different stages of development. If you put this issue in the past few decades, it must be the most important
Read moreJune 9, according to media reports, US scientists discovered a method to the atmosphere of carbon dioxide into useful industrial products, and promote their findings will help people or with carbon dioxide in air to produce biofuels. The Institute of Bioenergy Systems at the
Read moreAbstract On May 29th, the 2014 Annual Surveyor's Annual Meeting (the 8th National 100th Geological Team Leaders Symposium) hosted by the China Mining Association opened in Xiamen. The 8th Secretary-General of the National Committee of the Chinese People's Political Consultative Confer
Read moreHome>Bearing knowledge> Large-scale thin-walled bearing outer ring quenching and tempering process has achieved breaking development /*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Large-scale thin-walled bearing outer ring quenching and tempering process has achieved
Read moreCommon cutting fluids are used in casting, high pressure cooling and spray cooling: Pouring method The pouring method is the most widely used method. It is easy to use and widely used, but the flow rate is slow and the pressure is low. It is difficult to directly enter the maximum temperature of
Read moreOn April 30, the provincial video surveillance construction management conference was held in Handan. Vice Governor Li Ya attended the meeting and delivered a speech. Deputy Director of the Political and Legal Committee of the Provincial Party Committee and Deputy Director of the Provincia
Read moreAlthough self-absorption filter-type respiratory protection products protect the breathing safety of workers in some specific circumstances, due to certain limitations, there are still some negative effects on operations. Studies have shown that after wearing self-priming filter-type respiratory pr
Read moreThe ZW self-priming pump was invented to draw water for daily use in our daily life and is commonly used in southern China. Its working principle is to use water velocity and momentum to drive the pump impeller to pump water to the ground. The advantage of a self-priming pump is that it can be pump
Read moreThe structure of the centrifugal pump can be basically divided into horizontal centrifugal pump and vertical centrifugal pump according to the position of the shaft. At the same time, according to the type of the extrusion chamber and the suction mode, it can be divided into a volute type and a va
Read moreAlthough electric cars have been around for many years, they don't quite understand what electric cars are for more ordinary consumers. First of all, the electric vehicle referred to in this paper refers to a pure battery-driven vehicle, and the more general fuel cell and plug-in hybrid vehic
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Read moreAbstract Yesterday, the reporter learned from the Zhengzhou State Taxation Bureau that from January 1, 2014 to December 31, 2016, the income tax of small and micro enterprises was reduced by half, and the annual taxable income was less than 60,000 yuan and expanded to 100,000 yuan. That is, t
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