Three-wheel sprinkler prices and manufacturers

Sprinklers are mainly used for watering purposes. In addition to four rounds, there are three rounds of sprinklers on the market. Three-wheeled sprinklers have slower speeds

European Commission proposes new standards for toys

The European Commission has recently proposed a strict standard for improving the safety of European toys in order to strengthen the European Union’s toy standards, especially those that use chemicals. This written proposal is aimed at improving the safety of toys and replacing and imp

China's foundry machine tool industry still faces many constraints

The machine tool casting industry during the tough period is also a process from large to strong, which is very important for its development. At the same time, the 12th Five-Year Plan also puts forward a clear goal for China's machine tool foundry industry, that is, by 2015, the machin

Influencing factors of gold extraction by heap leaching

Of gold heap leaching process is inherently qualitative, technological factors influence the production process of gold leaching reactor are: solution spray leaching properties (cyanide concentration, oxygen content and pH value, etc.), liquid

Recover silver from waste film, emulsion and fixer

Various X-ray and photographic film and film in the process are fine crystals of silver salt emulsion film body on the sheet coated with a thin layer of the base. About 1 mg of silver is contained per square centimeter of the film. T

Recovery concept and calculation method

Mineral recovery is the percentage of the number of metal concentrate or a metal ore with a number of components or the number of useful components. This is an important beneficiation indicator that reflects th