C01 coal PT 2007-05-24 C02 mining PT 2007-05-24 NT C09 opencast mining PT C05 austenitic steel PT 2007-05-24 BT C10 steel PT C06 chromium steel PT 2007-05-24 BT C10 steel PT C07 manganese steel PT 2007-05-24 BT C10 steel PT C09 opencast mining PT 2007-05-24 BT C02 mining PT C10 steel PT 2007-05-24 NT C05 austenitic steel PT NT C06 chromium steel PT NT C07 manganese steel PT