Symbol 0849 from ISO 7000 - Title/Meaning: Phase shift 
Function/description: To identify the device on resistance welding equipment by which welding with phase shift is possible.
Own work using: iso.org/obp/graphics/grs/55c60ba5-eaa7-4fb2-95ee-93d3755b9220 200.png
Vectorization:  Mrmw