- downhole
- 井下: in the pit; under the shaft
- 的: 4次方是 The fourth power of 2 i ...
- 井下；井下的: dh
- 底部井眼；井下；井下的: down hole
- 井下: [矿物学] in the pit; under the shaft 井下作业 operation in the pit; underpit operation; 井下爆炸 well shooting; 井下采煤区 underground coal mining district; 井下乘人车 spake; 井下风巷 airway; 井下火灾 underground fire; 井下救护队员 dragerman; 井下挖掘机 underground excavator; 井下修理工 byeman; 井下有毒尘埃 [采矿工程] toxic dust; 井下运输 underground transportation; 井下总管 ground boss
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