| 摘要 |
<p>The driving of vehicles in stations is effected using sets of wheels 13 spaced along the track 12 and engaging a frictional sleeper 14 by friction. The length of the sleeper 14 is greater than the spacing of two successive wheels 13 so as always to be in contact with at least one wheel. The sleeper has, at one or both of its ends, reduced friction zones 17, 18 in order to avoid two wheels 13 simultaneously being in contact with the raised frictional zones 19 of the sleeper 14.
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