英语词汇“extremely irregular coal seam”的意思、用法、释义、翻译、读音、例句、短语、词组-英汉翻译词典

单词	extremely irregular coal seam
释义	extremely irregular coal seam 极不稳定煤层; 煤层厚度变化极大,呈透镜状、鸡窝状,一般不连续,很难找出规律,可采块段分布零星的煤层。
随便看	observation boat observation buoy system observation by incident light Observation by light microscope observation by transmitted light observation cabin observation car observation care unit observation cars observation check observation circuit observation condition observation data observation deck observation description observation desk observation device observation dome observation domes observation door observation elevator observation elevator, panorama lift observation equation observation equipment observation error

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