Symbol 5589 from IEC 60417 - Title/Meaning: Heavily soiled Function/description: To identify the control or step on the programme indicator for the heavily soiled option.
Additional information: 
This symbol is to be used in conjunction with one or more of the symbols 5587 and 5588
Published in: Supplement N, 1995,3C(Central Office)192
Own work using: iso.org/obp/graphics/grs/82ac66aa-c938-43af-afbf-bc0c664def1f 200.png
Vectorization:  Mrmw