Intelligent integrated switch-type electric actuator comes with a control box, the so-called mechatronics. With liquid crystal display, can feedback 4 ~ 20mA standard signal, you can determine the valve's full open, fully closed, and the uncertain middle position, that is, switch control. W.......

Cyanide gold extraction is one of the main methods for extracting gold from gold ore. The explanation of the mechanism of cyanide on the dissolution of gold is still inconsistent. Most people think that gold can form a gold complex and dissolve in the presen.......

It is reported that American shipowner Crowley Maritime said recently that it will continue to provide funds for the construction of new ships by financing banks. Although the comp.......