Teacher Cao's electrician course is suitable for students with level 0 knowledge. If you don't understand, I suggest you read it again and again from the first chapter to understand every knowledge point step by step.

Teacher Cao is a professional teacher in a university in Hunan Province, and also a senior trainer and engineer. He was appointed by the Ministry of Education to South Korea for technical study and exchange. Have more than ten years' experience in front-line teaching and training, and have undertaken electrical safety technical training for full-time and part-time safety officers of CSR; Regular maintenance of electrician training work; Electrical theory training of Zhuji Company; Time high and low voltage electrical equipment assembly professional knowledge training; Professional knowledge training of time electronic assembly and connection; Factory power supply and distribution technology experimental training teaching work, etc. , with rich experience in engineering and technical training.