Symbol 5657 from IEC 60417 - Title/Meaning: Mixing of substances Function/description: To identify the control or the indicator for the mixing of substances.
Additional information: 
Published in: New edition, 1998,3C/359/FDIS,3C/282/CDV (62A/170/CDV)
Own work using: iso.org/obp/graphics/grs/fed6c0c0-a642-4918-ad57-689bc3470295 200.png
Vectorization:  Mrmw