Mine plans - Stratigraphy - Part 2: Regional and local subdivisions - Hard coal
矿山平面图.地层学.第2部分:区域和局部划分.硬煤

2008-12-01

Investigations of the raw material in hard-coal-mining - Microscopical examinations of hard coal, coke and briquettes - Part 5: Reflectance measurements on vitrinites
硬煤开采中原材料的研究.硬煤、焦炭和型煤的显微镜检查.第5部分:镜质组反射率测量

2005-02-01