Complex sentence: The plant in Longdoz, however was hemmed in by the city, and could no expand, from 1957 the Longdoz plant ceased hot rolling of steel, and was used only for finishing of the plate, and distribution.
Split into simpler sentences: The plant in Longdoz, however was hemmed in by the city, and could not expand. After 1957 the Longdoz plant ceased hot rolling of steel, and was used only for finishing of the plate, and distribution.