Electrotechnics edited by Qin is a classic work. The first volume is about electrical technology, and the second volume is about electronic technology. Suitable for people with high school or above to study by themselves.

This paper systematically introduces the operation technology and related theoretical knowledge of installation, operation and maintenance of electrical equipment and electrical control circuits in factories, which is more important than production practice and easy to understand. The content is easy to understand, illustrated and easy to use, suitable for beginners of electrical engineering. Covering the basic knowledge and skills of electricians, full-color maps, and assisting mobile phones to scan codes and watch videos can further understand important knowledge points and operation explanations.