• 1 · Religion and Magic
• 2 · Nature
• 3 · Human Being, Man in General
• 4 · Society, Civilization, Culture
• 5 · Abstract Ideas and Concepts
• 6 · History
• 7 · Bible
• 8 · Literature
• 9 · Classical Mythology and Ancient History

• 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
• 47C149 · the rejected parts, refuse, waste (of industrial process)