A group coal seam的意思|示意
美 / /
英 / /
一组煤层
A group coal seam的网络常见释义
A组煤层 ...孔；A组煤层；淮南矿区 [gap=1664]Keywords : abnormal gas blow-out；drilling hole through limestone；A group coal seam；Huainan mining area ...
A group coal seam相关短语
1、 a coal seam group 煤层组