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For laying and fastening of railroad spans of tram roads of gauge 1,435 mm.
The grooves formed by a pair of rails for mining and field railways 80/14 serve for fastening of rails type NP 3; NP 4; NT 1; NT 2. The sloped panels K right and left serve for laying of tram railroad spans on crossings and in curves up to min. R = 25 m. They have the same UCISP and trade mark as well. The figure shows a sloped left panel.