The model identification of welding machine consists of two parts; The prefix indicates the type of welding machine (which can also be understood as successful performance), and the suffix indicates the current level;

such as WS-25; The prefix is "WS". The suffix is "25";

WS-25: DC argon arc welding machine (with built-in DC manual arc welding function), with rated output current of 25A;

the naming of welding machines is clearly stipulated in the national standard. See the screenshot below to see the meaning of the naming: