What is the difference between plug welding and slot welding?

17 What type of weld does the symbol below correspond to A Plug weld B Slot weld from MATH 8976 at Sachem High School North

The seam weld uses a similar process as a spot weld but in an elongated fashion There is no preparation like a plug or slot weld, rather the weld projects

abu slot  3 Qualification testing using the butt joint groove welds in Figure 1 shall qualify all groove, fillet, plug or slot weld joint types 5: Base Metal Form

acer nitro 5 hdd slot The shape of the plug weld is circular 5 Slot Weld Slot Weld