| 摘要 |
Apparatus is provided for breaking surface ice formed over a snow cover as sometimes develops on ski slopes or the like. A rotary unit, which may be dragged by a tractor, is formed with radial guides in spaced wheels with bars parallel to the axis of the wheels and mounted in the guides for free radial movement. The bars drop sequentially down against the ice surface and fall back again towards the center as the apparatus rotates.
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