Cooling or heating systems; Blowing-through of gun barrels; Ventilating systems

Child Classifications

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• F41A 13/02 Heating systems
• F41A 13/04 Injecting fluids into barrels or cartridge chambers (F41A13/08 takes precedence)
• F41A 13/06 Evacuating combustion gas from barrels (F41A13/10 takes precedence)
• F41A 13/10 Blowers or turbines for evacuating or cooling guns, e.g. driven by combustion gas pressure or recoil
• F41A 13/12 Systems for cooling the outer surface of the barrel (F41A13/10, F41A21/24 take precedence)