| 摘要 |
The present invention relates to a cross-country ski including a longitudinal rib on its upper part. This cross-country ski is characterised in that the cross-section of the rib 2 consists of the superposition of two elementary sections in the form of an isosceles trapezium, the upper trapezoidal section, which is extended by two inclined lateral faces 2b, 2c, this upper trapezoidal section is connected to a lower trapezoidal section whose upper small base corresponds to the large base of the upper trapezoidal section, the lower trapezoidal section comprises two inclined lower lateral walls 2d, 2e which are less inclined than the inclined upper lateral walls 2b, 2c, and the two inclined lower lateral walls 2d, 2e are connected to the low vertical edges 1a, 1b of the ski 1 which continue as far as the sole 3 of this ski. <IMAGE>
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