深、浅埋分界
Boundary between deep and shallow tunnels
浅埋深薄基岩煤层
shallow coal seam with thin bedrock
浅埋深厚煤层
shallow buried coal-seam
shallowly-buried and thick seam
浅埋深煤层
shallow buried depth coal seam
百分深度剂量曲线
Percentage depth dose curves
percent depth dose curve
percentage depth-dose distribution curve
表面裂纹和深埋裂纹
surface flaw and sub-surface flaw
不同埋深爆炸
explosion at different buried depth
残骸固化深埋
Deep bury solidified wreckage