| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent accumulation of water or waste by forming a small diameter part and a large diameter part non-coaxially with each other, matching the outer circumferences of them mutually along one side face of a pipe, and extending the matching parts linearly in the parallel direction to the pipe axis. SOLUTION: In this pipe 4, small diameter parts 5 and large diameter parts 6 are alternately formed in the pipe axis direction and formed non-coaxially with each other, and in one side face part of the pipe 4, the outer circumferences of the small diameter part 5 and the large diameter part 6 are matched with each other, The matched part is linearly extended parallelly to the pipe axis. In this way, the pipe 4 can be freely bent because the small diameter parts 5 and the large diameter parts 6 are alternately formed in the pipe axis direction, so that flow resistance of water or the like inside the pipe 4 can be greatly lowered, and consequently, accumulation of liquid or waste in a lower side part 7 can be prevented almost completely.</p> |
