- Top
- 4 · Society, Civilization, Culture
- 47 · crafts and industries
- 47C · industrial processes, handling of materials
- 47C1 · preparing, cleaning, sorting, selecting (industrial processes, handling of materials)
- 47C14 · sorting, selecting of material
- 47C141 · sorting, selecting of material by sieving, sifting, screening
47C141(+8) · sorting, selecting of material by sieving, sifting, screening (+ agricultural processes)