Device installed on secondary tracks. The Scotch blocks shoes allow for the independence of the circulation tracks compared to parked car joints. They consist of a shoe-shaped bracket that can be positioned on the track, using a linkage, to prevent any movement of parked rolling stock. The Scotch block linkage can be operated by an electric control box or a box for manual operation. In some cases the electric control box can be equipped with a device for automatic return to the initial position. The Scotch blocks are always hookable (that is, they can be kicked out of vehicles without being deformed)
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