Symbol 5686 from IEC 60417 - Title/Meaning: Stereo focal spot Function/description: To identify the control or the indicator for selection of stereo focal spot operation of an X-ray tube.
Additional information: 
See also symbols 5325, 5326 and 5327
Published in: New edition, 1998,3C/361/FDIS,3C/284/CDV (62A/172/CDV)
Own work using: iso.org/obp/graphics/grs/3143fb68-39e8-4ffb-9180-4ff0de8123cb 200.png
Vectorization:  Mrmw