| 摘要 |
In a corrugate tube as a flexible tube formed of ridges and grooves alternately arranged in a line, a rib is extended across the grooves in a longitudinal direction of the corrugate tube. A curved wall is formed on both sides of the ribs in each groove. A curved bottom wall is formed at a bottom of each groove. Electric wires are inserted into the corrugate tube. The folding corrugate tube is arranged in a case of a power-supplying device. The rib is disposed between outer and inner bending edges of the corrugate tube and extended in the longitudinal direction of the corrugate tube.
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