“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	fluidics fluidifiant fluidification fluidify fluid impulse fluid in cell method fluid inclusion fluid insufficiency of large intestine fluid intelligence fluid in the earth’s interior fluidised bed furnace fluidity fluidity of biomembrane fluidization fluidized bed fluidized-bed bioreactor fluidized bed boiler fluidized-bed direct reduction fluidized-bed drying of mineral processing products fluidized bed electrode fluidized bed furnace fluidized bed gasifier fluidized bed heat exchanger，FBHE fluidized bed roasting fluidized bed type of crystallization and drying machine

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