Fasteners are the basic mechanical parts of the national economy with the widest range of applications and the largest number of uses. China's fastener industry adjustment pace has accelerated, from one-sided pursuit of output value production, to the improvement of quality and brand effect, from one-sided pursuit of large and complete, to the special, refined, special direction, from production to production service The concentration of the fastener industry has clearly emerged. The three major fastener industry clusters in Chang Delta, Pearl River Delta and Bohai Bay have been formed, and several fastener industrial bases such as Jiaxing, Ningbo, Wenzhou, Suzhou, Dongguan, Hebei Xingtai and Yongnian have been built. The huge market for construction machinery paves the way for the development of the fastener industry. The machinery industry is the largest industrial sector in China. In 2011, China's machinery industry realized a total industrial output value of 16.89 trillion yuan. According to customs statistics, January-November 2011, The import and export of machinery industry was 574.557 billion US dollars, an increase of 24.09. Among them, imports were 283.023 billion US dollars, up 23.34 year-on-year; exports were 291.534 billion US dollars, up 24.83 year-on-year; import and export trade surplus was 8.51 billion US dollars. Fasteners are also the main basic parts of the machinery industry. The development of the machinery industry puts higher demands on fastener products. It is understood that during the 12th Five-Year Plan period, the number of construction machinery products such as loaders, excavators and road rollers will reach 6 million units, and the annual sales volume will be around 50,000 units. Based on this estimate, the annual demand for high-strength fasteners is about 20,000. ~ 30,000 tons. The urban rail transit infrastructure involves related industries in many fields, including railway equipment manufacturing, high-speed railway bearing railway communication engineering optical communication equipment, railway engineering construction and engineering machinery. The construction of these projects will bridge the development of fasteners. Ride the road. A large number of construction machinery products, including loaders, excavators, truck cranes, road rollers, forklifts, bulldozers, concrete machinery, etc., rank first in the world, and China has become a real world construction machinery manufacturing country. The rapid development of the machinery industry and the huge market scale provide a broad space for the fastener industry. However, due to China's late understanding of the important position of mechanical basic parts in the machinery industry, long-term lack of investment has resulted in poor foundation, weak foundation and weak strength. In particular, with the improvement of the level of Chinese mainframes, the bottleneck of mechanical basic components behind the mainframe has become increasingly apparent. In recent years, although the fastener industry has given certain support in technology introduction, technological transformation, scientific research and development, etc., compared with the current market demand and foreign level, there is still a big gap. At present, domestic common standard fasteners have been oversupplied, while high-end fasteners are in short supply and depend on imports. With the improvement of national industrialization level and technological progress, the use of high-strength fasteners has gradually increased. The basic parts represented by fasteners are not only the basic industries of China's equipment manufacturing industry, but also an important foundation in all fields of national economic construction.

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