The most common spot welding is resistance spot welding, which refers to the resistance welding method that the weldment is assembled into a lap joint and pressed between the two poles, and the base metal is melted by resistance heat to form a solder joint; In addition, there is arc spot welding, which refers to the welding method of melting two overlapping workpieces with arc as the heat source to form spot welding.
The difference between the two is obvious and should not be confused. There are some expressions such as "fixed points" in spoken English, which are unambiguous, but after all, they are not standardized enough and should be avoided in process documents or scientific papers.