Symbol 2574 from ISO 7000 - Title/Meaning: Retarder Function/description: To identify the control that activates the retarder as a supplemental to brake system.
Application referenced in: ISO 2575
Additional information: 
The retarder decelerates the vehicle without using mechanical friction in order to avoid overheating the brake system.
Own work using: iso.org/obp/graphics/grs/87d97710-5b12-47f5-8a21-3d0cc67b4795 200.png
Vectorization:  Mrmw