| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an elbow that enables easily removal of refuse, fallen leaves and the like accumulated in the elbow.SOLUTION: An elbow includes: an elbow body 11; an opening that is provided in the elbow body 11; an opening/closing part 12 that is openably/closably attached to the opening; an engaging part 12a that is provided in the opening/closing part 12; and a part 11a to be engaged, which is provided in the elbow body 11 and which is engaged with the engaging part 12a when the opening/closing part 12 is fitted into the elbow body 11.</p> |
