Symbol 5714 from IEC 60417 - Title/Meaning: Variation of scan aperture Function/description: To identify the control or the indicator to vary the angular aperture, for example on diagnostic ultrasound equipment.
Additional information: 
Published in: Amendment 2, 2002,3C/473/FDIS,62A/228/CDV
Own work using: iso.org/obp/graphics/grs/2765c87c-12d0-4e2b-8199-59626ac10904 200.png
Vectorization:  Mrmw