a plug or slot weld is what type of weld, just prepared differently?

Weld and Welding Symbols plug and slot welds Welds can be classified according to: Types of welds: groove, fillet, plug, and slot welds weld plug slot Plug, slot, and spot weld; J-groove weld; Flare-bevel groove weld; Bevel-groove weld Edge Joint Welding The metal surfaces are joined together

plug and slot weld Numbers in plug and slot welds can be used to determine the size or diameter of the plugs , the length of the plug hole , the number of plugs or slots