Symbol 0853 from ISO 7000 - Title/Meaning: Cycle with decreasing current «down slope» 
Function/description: To identify the device on resistance welding equipment by which marking cycle with decreasing current is possible.
Own work using: iso.org/obp/graphics/grs/55c0225a-1fbb-417e-8821-37f9a724703c 200.png
Vectorization:  Mrmw