This paper systematically summarizes the basic design idea aiming at developing the pipeline steel with better comprehensive properties.
系统总结了管线钢合金设计的基本思想，力求为研制综合性能更佳的管线钢指明方向。
This paper systematically summarizes the gob gas migration law and numerical simulation research.
本文系统总结了采空区瓦斯运移规律及数值模拟研究成果。
This paper systematically summarizes the results of researching the soft rock classification, attribution and judgement of China′s coal mine drifts;
本文系统地总结了我国煤矿巷道在软岩分类、软岩属性及软岩判定等方面的研究成果；
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