| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively and easily manufacture a sheath pipe for looking at a pipe inside state from the outside. SOLUTION: A steel wire is wound on the outer periphery of a formed cylindrical pipe body by forming the cylindrical pipe body by fusing mutual end parts of mutually adjacent band plate-like members by spirally winding the band plate-like members having a single width made of a permeable thermoplastic synthetic resin. COPYRIGHT: (C)2007,JPO&INPIT
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