| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent noise from being generated while keeping a flexible hose light-weight. SOLUTION: This flexible hose 1 has a bellows portion 9 alternately equipped with ridge-shaped portions and valley-shaped portions in the hose longitudinal direction. In this case, at an intermediate portion of the bellows portion 9, a straight portion 10 wherein the outer diameter is the same as the outer diameter of the ridge-shaped portion, the external surface is flat, and the dimension in the hose longitudinal direction is shorter than the dimension in the hose longitudinal direction of an adjacent bellows portion 9, is integrally forged with the bellows portion 9, and the generation of noises due to a high speed gas flowing inside is prevented from occurring.</p> |
