英语词汇“first mined key seam”的翻译、意思、用法、释义-英汉汉英双解词典

单词	first mined key seam
释义	first mined key seam 首采关键层
随便看	mine transformation mine transient electromagnetic method mine transient electro magnetic method mine transient electromagnetism mine transit mine transport mine transportation mine transportation, mine haulage mine transportation system minetree mine tremor mine trepan mine truck mine truck engine minets Minetsuchi Minetsugu Minetsuna Minetsune minett Minetta minette minettefels minette-felsite minette ore