Symbol 3413 from ISO 7000 - Title/Meaning: Engine rotational speed, instantaneous increase Function/description: To identify the control that increases the engine rotational speed.
pay attention to orientation of symbolAdditional information: 
Fonts shown are not restrictive.
Own work using: iso.org/obp/graphics/grs/71109ee5-e7aa-4ff5-a89b-7152fcc55fcc 200.png
Vectorization:  Mrmw