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It is the most common type of fire hose coupling used in the United States.
During that era, American cities had more than six hundred different sizes and variations of fire hose couplings.
An expansion ring fire hose coupling is commonly used on lay-flat fire hose.
Has two female threads for connecting male fire hose couplings to inlets of breechings, hydrobleners, nozzles or pumps.
They devised the auger, buzz saw, window roller shade, chain and sprocket drive, fire hose coupling and many other inventions and processes.
Efforts to fight the fire were hampered by inadequate fire extinguishers, fire hose couplings which did not match the water line, and a lack of water in the lines.
