Theoretical and application study on unclassified tailing filling have been systematically carried out in U. S.
因此,美国、南非、加拿大、德国和中国等对全尾砂充填技术进行了较系统的理论和应用研究。
Theoretical and application study on unclassified tailing filling have been systematically carried out in U. S. , South Africa, Canada, Germany and China.
因此,美国、南非、加拿大、德国和中国等对全尾砂充填技术进行了较系统的理论和应用研究。
Therefore the study of stock prediction method has great application value and theoretical significance.
因此,股市预测方法的研究具有极其重要的应用价值和理论意义。
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