Symbol 0850 from ISO 7000 - Title/Meaning: Number of thermal pulses 
Function/description: To identify the device on resistance welding equipment by which marking the control unit and the display unit with the number of pulses is possible.
Own work using: iso.org/obp/graphics/grs/63c1a862-23b3-4283-b920-5a1f38ed82aa 200.png
Vectorization:  Mrmw