| 摘要 |
PURPOSE: A hot-wire connection pipe for a synthetic resin pipe is provided to improve watertightness and the bearing power of connected parts. CONSTITUTION: Pipe wall members(22) have hot-wires(21) therein, and are wound around the inside of a connection pipe(20). The pipe wall members are integrally connected with each other by I-shaped joining units(23). A cylindrical pipe is formed with the integrated pipe wall members. A heat-shrinkable skin layer(24) is formed at the outer circumference of the cylindrical pipe.
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