英语词汇“未开采煤层”的翻译、意思、用法、释义-英汉汉英双解词典

单词	未开采煤层
释义	未开采煤层 solid coal seam
随便看	backsters back sth up back stick back stiffness backstitch back stitch Back Stitch back-stitch backstitched back stitcher backstitches backstitching Back stitching backstitchlockstitch backs-to backstock backstocking backstocks backs-to-front backs-to-nature backstone back-stone back stoop falling backstop backstores