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China's CNC flame cutting machine started in the mid-80s of the last century, while the CNC plasma cutting machine was later. Most CNC plasma cutting machines are based on economical machine tools. There have been more than 50 manufacturers in China who once engaged in the manufacture of CNC cutting machines. The predecessors of many manufacturers are welding and cutting tools factories, and their technical background is poor. Throughout the 1980s, domestic companies were unable to compete with foreign companies regardless of product quality or product quantity.
After a long period of development, the CNC cutting machine has been relatively mature. Both the technical level and the production efficiency have been gradually increased to meet the needs of more customers, expand the market competitiveness, and the market demand is also growing. The cutting quality and cutting speed can be effectively improved, the working efficiency is greatly improved, and the labor intensity of the operator is reduced.
In the early 1980s, the domestic market of CNC cutting machines was occupied by foreign cutting machines. In the middle and late 1980s, domestic CNC cutting machines were gradually produced and put on the market. In the early 1990s, with the development of domestic CNC cutting machines, the market was rapidly expanding. , forcing foreign companies to develop in the country, the price of cutting machines has also dropped significantly. In the late 1990s, as the quality of domestically-made CNC flame cutting machines had stabilized and prices had fallen sharply from previous years, they have gradually replaced imported machines.
After entering the 1990s, some domestic companies continuously developed new equipment for numerical control plasma cutting machines in accordance with world standards. Moreover, some of the important technical indicators of the equipment are not inferior to similar foreign equipment. At the same time, with the adjustment of the domestic market economy, the domestic manufacturers of CNC plasma cutting machines have made great progress.
Today's manufacturing industries in the world are adopting a wide range of numerical control technologies to improve their manufacturing capabilities and levels, and to increase their adaptability and competitiveness in dynamic and volatile markets. CNC cutting machine is a technology that uses digital information to control mechanical movement and working process; it is the basis for manufacturing automation, flexibility, and integrated production; it is an essential material means to improve product quality and increase labor productivity; it is a national defense The important strategic material of modernization is an important basic industry that relates to the country’s strategic status and reflects the country’s overall national strength.
In the 21st century, the CNC cutting industry in China is facing various new challenges and the international market competition is becoming more intense. We should aim at the world advanced level, constantly develop new products, and promote the general improvement of the domestic industry's technical level. Only in this way can we eliminate low-grade, low-quality products, purify the market, and drive the industry manufacturers to change their business philosophy.
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Barricades are obstacles that block road traffic. They can refer to barriers used as fences during road construction, oil pressure security barricades to prevent terrorist attacks outside important building doors, or roadblocks temporarily constructed by demonstrators during large-scale demonstrations.
The use of barricades may have originated from the turbulent Paris of the 16th century. Under the rule of King Henry III, the lives of the French people were hard. The supporters of the Duke of Guise took to the streets on May 12, 1588, and built roadblocks , History called "First Day of the Barricades". For the next two centuries, roadblocks played an extremely important role in major social movements in France.
Rejection is a type of motorized roadblock. In ancient China, setting up long guns or matching wooden poles to create obstacles to defend against the attack of enemy cavalry is called "rejecting carbines". The three intersecting and intersecting, fixed with iron as the "distant gu solid refusal carbine". A large wooden bar, with different lengths of wood, wears nine to ten iron guns, which is called a "close guard antler". Similar fortifications exist in the West.
Modern refusal horses are instead composed of iron frames and barbed wire, so it is also called "iron refusal horses" and has a wider range of uses. In addition to its military use, it will also be used in the riot operation. It has the effect of isolating and blocking people and vehicles. In addition, some modern horse-rejecting horses are also designed with walking wheels and strong maneuverability, which can be completed in a short time by 2 to 4 people. However, due to its light weight, short piles are sometimes added to the ground.
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