Farms under mountain control in the Saarland, civil engineering, limestone, approved farm land and mining areas
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Farms under mountain control in the Saarland, civil engineering, limestone, approved farm land and mining areas, Federal Mining Act (BBergG)
萨尔兰州受矿山管控的农场、土木工程、石灰岩、获批农田与矿区，以及《联邦矿山法（BBergG）》
