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ISBN 10: 7502849971ISBN 13: 9787502849979
Da: liu xing, Nanjing JiangSu, JS, Cina
Libro
paperback. Condizione: New. Paperback. Pub Date: 2018-10-01 Pages: 28 Language: Chinese Publisher: Earthquake Publishing House One summer evening in 2045. 10-year-old Dongfang Zetian was doing homework at home. Suddenly. the crystal ball hung in front of his chest was dazzling Guangku. this crystal ball was picked up when he went out to play a month ago.?Immediately after the sudden earthquake. the city suffered a huge disaster.?In connection with the strange sparkle of the crystal ball before the earthquake. Dongfang Z.
Editore: China Mining University Press, 2019
ISBN 10: 756460882XISBN 13: 9787564608828
Da: liu xing, Nanjing JiangSu, JS, Cina
Libro
paperback. Condizione: New. Paperback. Pub Date: 2019-09-01 Pages: 224 Language: Chinese Publisher: China Mining University Press Mine Ventilation national higher vocational education Thirteen Five planning textbook is divided into ten chapters. the system introduces the mine air. roadway air volume calculation. pressure ventilation mine ventilation. mine ventilation resistance. mine ventilation power. coal mining face .