Mexico, as a major economic power country in Latin America and an important mining producer in the world, is very rich in mineral resources. Among them, silver, oil, natural resources and other resources rank in the top of the world. The mine is not only full of gangue that looks like a galaxy under the […]

  In Hong Kong, China, there is endless traffic passing through the local tunnels every day, and the Hong Kong subway also carries a large number of passengers, where is a large population with relatively little land. In response to substantial numbers of users, the Hong Kong Government has continuously improved subway safety measures and  […]

  The French road network is the densest in the world and the longest road among EU countries, with a total length of more than 900,000 kilometers, including 12,000 kilometers of highways and more than 800 road tunnels. In consideration of road safety measures, in the “Descenderie de Modane” tunnel under construction of the Modane […]

  The offshore oil drilling platform is a special ship used for offshore oil exploration operations, and its requirements for safety and pollution prevention are quite high. During offshore oil and gas drilling operations, drilling rigs which weigh hundreds of tons must have sufficient supporting and placing space, as well as a place where the drilling […]

As a new type of prison management mode, the prison telephone system is widely used in the prison management. It is a new type of integrated intelligent communication system for prisoners.And our video phone is also being used in it . It not only has the function of calling , but also can see the […]