Agricultural tractors and self-propelled sprayers. Protection of the operator (driver) against hazardous substances. Cab classification, requirements and test procedures|Crop protection, Performance testing, Classification systems, Agricultural tractors, Particulate air pollutants, Spraying equipment (agriculture), Forestry equipment, Air cleaning equipment, Verification, Dangerous materials, Instructions for use, Protective cabs, Sprayers, Dust, Aerosols, Air filters, Air purification, Cabs, Agricultural equipment, Occupational safety