Symbol 0852 from ISO 7000 - Title/Meaning: Cycle with increasing current «up slope» 
Function/description: To identify the device on resistance welding equipment by which marking cycle with increasing current is possible.
Own work using: iso.org/obp/graphics/grs/7aff857b-7cd8-461c-94b8-602bfc2d8e2e 200.png
Vectorization:  Mrmw