| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pipe having a thin tube or film with easily variable inner area on a part of an inner wall of the pipe. SOLUTION: This is the pipe with easily variable inner capacity by adhering a thin and soft tube to the inner wall of the pipe or providing the thin film by integral molding and pressurizing or depressurizing air in the tube or film.</p> |
