英语词汇“hard thick coal seams”的翻译、意思、用法、释义-英汉汉英双解词典

单词	hard thick coal seams
释义	hard thick coal seams 坚硬厚煤层
随便看	deck force deck form deck form construction deck frame deck framing deck gang deck gear deck-gear deck-gear locker deckgebirge deck girder deck-girder angle deck-girder bridge deck-girder steel dam deckglass deck glass deck-glass deck glass roof deck golf deck grating deck grillage deck grip deck guide bollard deck guides deck gun