The Shanghai Municipal Government has thrown a heavy notice and decided to implement the national 6b emission standard ahead of the light vehicle registered in the city (including the transfer of other provinces and cities) from July 1 this year. Despite the previous national blue sky defense

The UV aging test chamber uses a fluorescent UV lamp as a light source to simulate the weathering resistance of the material by simulating ultraviolet radiation and condensation in natural sunlight to obtain the weather resistance of the material. It can simulate environmental conditions such as ul

As an important part of modern engineering, mechanical automation has penetrated into every aspect of the construction process. Through close integration with microelectronics, computer technology and information processing technology, mechanical automation has made new breakthroughs in many fields

Farm name: Shandong Weihai Yifang seedling planting farm; Construction site: Hebanshi Village, Wendengying Town, Wendeng District, Weihai, Shandong Province; Equipment working conditions: digging, leveling, planting trees, moving trees, etc.; Efficiency evaluation: instead of labor, earn more t

A video conference is a method in which a television and a television are used to hold a conference between users in two or more locations to transmit voice and images in real time. It can also attach the transmission of still images, files, and signals. Those who participate in the video conferen

As early as during the Second World War, the US hai army and the kong army encountered the problem of identifying the enemy and the enemy. For this purpose, the "enemy-identification system" was developed, and RFID technology was born. Nowadays, with the development of the Internet of Th

Such collectors are chemically inert and poorly soluble in water. In the pulp, the ion or molecular state cannot be used to interact with the mineral surface, but the oil droplets are spread on the surface of the mineral. Therefore, the main feature of such an agent is that it does not chemically re

The chemical name of xanthate is a hydrocarbyl dithiocarbonate. There are ethyl xanthate, butyl xanthate, amyl xanthate and the like. A xanthate having a carbon number of less than 4 in a hydrocarbon group is collectively referred to as a high-grade xanthate. The ability of high-grade xanthate to ha