On July 19th, China Internet Network Information Center (CNNIC) released the "30th Statistical Report on Internet Development in China" in Beijing. According to the "Report", as of the end of June 2012, the number of Chinese netizens reached 538 million, and the growth rate has become more stable. The most striking thing is that the number of mobile Internet users reached 388 million, and the mobile phone surpassed the desktop computer for the first time. terminal. According to the "Report", in the first half of 2012, mobile phones became the largest Internet terminal for Internet users in China. The use rate of desktop computers, which are traditional Internet terminals, is gradually declining, and the way of Internet access for Chinese netizens presents a new pattern. In addition, in the first half of 2012, the number of users watching videos over the Internet increased by approximately 25 million. According to China Internet Data Platform, the average daily visit time of online video users in the second quarter of 2012 increased by nearly 10 minutes compared with the first quarter. Network video shows an increasing trend in both user size and user depth. Compared with the steady growth of the overall network video users, the growth of mobile video users is even stronger, and the proportion of mobile Internet users has increased from 22.5% at the end of 2011 to 27.7%. The habit of users watching videos online using mobile terminals is gradually being developed.
Double Disc Grinding And Polishing Machine
Grinding and polishing are the same mechanical movement, the principle is the same. But for surface quality, the surface finish of polishing is higher than that of grinding. In fact, polishing fluid can be said to be the last process of grinding, grinding and polishing can be realized on the same plane polishing machine at the same time. Grinding is divided into rough grinding, fine grinding, polishing is divided into rough throwing, fine throwing. Most of the time, we have three processes to process the surface quality of products: rough grinding, fine grinding, fine polishing. With these three processes, the workpiece surface flatness, parallelism, roughness is quite high. Some customers do not have such high accuracy requirements, especially roughness requirements are not so high, so they only use the first two processes, or the fine grinding process. Specific to see the quality of the workpiece surface itself, as well as customer requirements to achieve the quality.
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