Symbol 1586 from ISO 7000 - Title/Meaning: Sieve adjustment 
Function/description: To identify the control that adjusts the sieve to allow larger or smaller kernels of grain to fall through the sieve. To indicate the operational status of the sieve.
Own work using: iso.org/obp/graphics/grs/47019a92-e5c4-4efa-9913-e8fa7f4c8720 200.png
Vectorization:  Mrmw