| 摘要 |
PROBLEM TO BE SOLVED: To efficiently pass water by restraining pressure loss with little turbulence of a water flow at the time of passing water by bending an automorphic hose in a small radius of curvature at a small diametrical part, storing it in a fire hydrant box in a state of installing a nozzle on it and connecting the small diametrical part and a large diametrical part to each other through a tapered part. SOLUTION: A small diametrical part 7 is formed on a tip part, a large diametrical part 6 is formed on a rear part, and the large diametrical part 6 and the small diametrical part 7 are connected to each other through a tapered part 8 of more than 5 cm long an inside diameter of which continuously changes on an automorphic hose for a fire hydrant 5 constituted by applying a rubber or synthetic resin lining on an inner surface of a jacket made by spirally weaving a stiff linear body against warp arranged in a ring.
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