| 1/00 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) |
| 1/02 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Test models (analogue computers therefor G06G 7/5) |
| 1/04 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air ducts (suspension devices E21F 17/02) |
| 1/06 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air ducts (suspension devices E21F 17/02) Duct connections (tube connections in general F16L) |
| 1/08 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Ventilation arrangements in connection with air ducts, e.g. arrangements for mounting ventilators (ventilators per seF04D) |
| 1/10 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air doors (doors in general E06B) |
| 1/12 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air doors (doors in general E06B) Devices for automatically opening air doors |
| 1/14 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Air partitions; Air locks (dams E21F 17/103; air locks for foundations E02D) |
| 1/16 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Shaft covers |
| 1/18 | Ventilation of mines or tunnels; Distribution of ventilating currents (ventilating rooms or spaces in general F24F) Gravity-flow ventilation (E21F 1/02-E21F 1/16 take precedence) |
| 3/00 | Cooling or drying of air (air-conditioning rooms or spaces in general F24F) |
| 5/00 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) |
| 5/02 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) by wetting or spraying |
| 5/04 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) by wetting or spraying Spraying barriers (spray nipples, spraying in general B05B, B05D; picks with arrangement of fluid-spraying nozzles E21C 35/187) |
| 5/06 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) by wetting or spraying Fluids used for spraying |
| 5/08 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Rock dusting; Depositing other protective substances |
| 5/10 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Rock dusting; Depositing other protective substances Devices for rock dusting |
| 5/12 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Rock dusting; Depositing other protective substances Composition of rock dust |
| 5/14 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Fluid barriers or rock dusters made to work by, or at the same time as, shots or explosions |
| 5/16 | Means or methods for preventing, binding, depositing or removing dust; Preventing explosions or fires (dams E21F 17/103; applying liquids or other fluent materials to surfaces in general B05; flue-gas indicators G01N) Layers of hygroscopic or other salts deposited on floors, walls, or the like, for binding dust; Deposition of such layers (dust-absorbing materials in general C09K 3/22) |