Fire Hose Vacuum
Encyclopedia
A Fire Hose Vacuum
is a small pneumatic device that removes residue air from the inside of a fire hose, thereby making it smaller and somewhat rigid, thus allowing more hose or other equipment to be stored on a fire apparatus
Fire apparatus
A fire apparatus, fire engine, fire truck, or fire appliance is a vehicle designed to assist in fighting fires by transporting firefighters to the scene and providing them with access to the fire, along with water or other equipment...

as well as making loads or packs deploy with increased ease.
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