Symbol 5702 from IEC 60417 - Title/Meaning: Ultrasound image, positioning of the focus Function/description: To identify the control or the indicator to vary the focus in image depth.
Additional information: 
The respective direction may additionally be given by direction arrows
Published in: Amendment 2, 2002,3C/452/FDIS,62A/228/CDV
Own work using: iso.org/obp/graphics/grs/3ba55348-fd47-476f-8147-1462f9d3b842 200.png
Vectorization:  Mrmw