side hill cut
侧山切割
以上为机器翻译结果，长、整句建议使用 人工翻译 。
It is a small drift mine - a mine cut into the side of a hill, where the coal seam is accessed by walking in.
BBC: Welsh mine rescue: Third Gleision miner found dead
Two more men escaped unaided from the drift mine - a mine cut into the side of a hill where the coal seam is accessed horizontally - before emergency services arrived.
BBC: Trapped miners: Bid to rescue men in Swansea Valley
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