| 摘要 |
This is a tube, the generatrix of the external surface of which has a recessed undulated profile with a wave shape having a flat crest and a flat trough. According to one aspect of the invention, the length L1 of the crest 12 of the wave shape of this tube and the length L2 of the trough of this wave shape are related by the following expression: 1.41 < L1/L2 < 1.46. Application, in particular, to ringed tubes for electrical conductors. <IMAGE>
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