1, electrician's books include electrician foundation, electrotechnics, electronic technology, electrical control, instrumentation, motors and transformers, etc.

2. The welder's books include the welder's basic operating skills, the welder's practical manual, etc.

3. Electrician refers to the personnel (jobs) engaged in industrial production systems such as power production and electrical manufacturing, electrical maintenance, construction and installation industries.

4. Welder is a type of work that closely connects metal or nonmetal workpieces by using appropriate welding methods, reasonable welding technology, suitable welding equipment and fillers of the same material or different materials.