| 摘要 |
<p>PURPOSE:To propose a respiration hose of respiration device which has a flat inner peripheral surface having no recess liable to stay a dirt and the like, while maintaining necessary properties such as a flexibility. CONSTITUTION:A respiration hose 10 of a respiration device for diving has a peripheral wall 11 in which a thick wall part 12 where the inner peripheral surface is flat and projects to the outer side; and a thin wall part 13 curved to the inner side in a small curvature; are formed alternatively, in the observation when the hose 10 is cut in the axial direction. Since the inner peripheral surface is actually a flat surface, dart and the like staying in recesses of a bellows hose do not increase such various germs, etc., that a sanitary trouble is caused. The necessary properties for the respiration hose such as flexibility and the like are obtained.</p> |
