What are the classifications of transformer cores?

1. High frequency class: Iron powder core Ferrite core Ferrite core is used in high-frequency transformers. It is a ceramic magnet with a spinel crystal structure. This spinel is iron oxide and other divalent metal compounds. For example, kFe2O4 (k stands for other metals), current

Soil pollution prevention and control in action

With the release of the “Soil Pollution Prevention Action Plan” (ie “Soil Ten”), China will carry out large-scale soil pollution investigation, prevention and restoration work. “Ten Shi” lists the timetable and road map for soil pollution prevention, including th

China's first unmanned fishing boat is available

On the morning of September 29, a product launch conference held in the Rizhao Economic and Technological Development Zone launched the first unmanned fishing boat in China. Previously, CCTV's "I Love Invention" column, broadcasted "Fishing Pioneer" several times, introduce