Urban sewage treatment refers to the measures taken to change the nature of sewage so that it does not harm the environmental waters. Urban sewage treatment technology is to use a variety of facilities and equipment and technology, the sewage contained pollution substances from the water separation and removal, so that the harmful substances into harmless substances, useful substances, water is purified, and make full use of resources.

Underground comprehensive pipe gallery is a kind of public infrastructure formed by placing two or more pipelines in it. It is the development direction of urban lifeline engineering infrastructure.The Underground comprehensive pipe gallery system not only solves the problem of urban traffic congestion, but also tremendous facilitates the maintenance and repair of municipal facilities such as power, communication, gas, water supply and drainage.

Industrial automation is the machine equipment or production process in the absence of direct manual intervention, according to the expected goal to achieve measurement, manipulation and other information processing and process control. Automation technology is to explore and research the method and technology to realize automation process. It is involved in machinery, microelectronics, computer, machine vision and other technical fields of a comprehensive technology.

Most coal mines have built or will build a variety of automation systems, from the point of view of system engineering on the whole to carry on the unified automatic management of the mine, prevent the "information island" phenomenon, effectively integrate all kinds of resources and give play to the maximum benefit of automation integration, it is necessary to establish a unified coal mine integrated automation system.

The large-scale power system that emerged in the 20th century is one of the most important achievements in the history of human engineering science. It is an electric power production and consumption system composed of power generation, transmission, substation, distribution and utilization. It transforms primary energy in nature into electricity through mechanical energy devices, and then supplies power to users through transmission, substation and distribution.

While the expressway network makes outstanding contribution to the national economic development, it also poses a severe test to the automation and intelligence of expressway management and operation. With the development of communication technology and electronic technology, electromechanical system of expressway has gradually become the basis of expressway management and operation.

At present, community residents not only pursue high quality of life, but also pay special attention to the safety of life and property protection. Security system has become the basic configuration of intelligent community information system construction. The community security system provides wired and wireless integrated transmission and PoE power supply solutions to make community management more efficient, secure, and intelligent.

Wireless network refers to the network that can realize the interconnection of various communication devices without wiring. In recent years, the development of wireless network is very rapid, and people‘s dependence on it is also gradually increasing. People prefer wireless networks to mobile networks because they are fast and easy to connect to.