“roof of coal seam”的概念、定义、翻译、参考文献-科学参考

单词	roof of coal seam
释义	roof of coal seam Encyclopedia 理学煤炭地质勘查释 roof of coal seam煤层顶板在正常顺序的含煤岩系剖面中，直接覆于煤层上面的岩石。
随便看	Joseph Jérôme Lefrançois de Lalande Joseph Kabila Joseph Kasavubu Joseph Kosuth Joseph Kwame Kyeretwie Boakye Danquah Joseph Lagu Joseph Lanner Joseph Leabua Jonathan Joseph Leonard Goldstein Joseph Liouville Joseph Lister Joseph-Louis Gay-Lussac Joseph-Louis Lagrange Joseph-Louis Proust Joseph Mallord William Turner Joseph Margolis Joseph Marie Jacquard Joseph Martin Shikuku Joseph Medill Joseph Mermet Joseph Moise Agbojelou Joseph Msika Joseph Nanven Garba Joseph Nicephore Niepce Joseph Nye

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