thick coal seam的意思|示意
厚煤层
thick coal seam的网络常见释义
厚煤层 中小煤[矿业]厚煤层实现高效采煤技术研究 - 久久建筑网 关键词：煤矿；厚煤层；采煤技术；机械化 [gap=597]Keywords: coal; Thick coal seam; Coal mining technology; mechanization
特厚煤层 ... main material 主要原材料 thick coal seam 特厚煤层 wall light with guard 带灯罩壁灯 ...
thick coal seam相关短语
1、 shallow thick coal seam 浅埋深特厚煤层
2、 hard thick coal seam 硬厚煤层
3、 extra-thick coal seam 特厚煤层