| 摘要 |
<p>PROBLEM TO BE SOLVED: To linearly connect narrow clearances to each other, and ensure an effective inner diameter when the conventional pipe is broken or cut. SOLUTION: A straight pipe 1 whose one side outer diameter is large is cut in a proper size, one side having a large diameter in a socket 2 is inserted from one side having a small outer diameter in the straight pipe 1, the one side having the small outer diameter in the straight pipe 1 is joined with the other conventional pipe with a conventional socket. While a regulating ring 3 is held to an opposite side, a socket is moved, and the conventional pipe disposed opposite to the straight pipe 1 is joined.</p> |
