隧道间距
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tunnel space between
隧道空间
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Earlier Wednesday, a fifth hole drilled down into the mine found just six inches of open space left between the roof and rubble in an 8-foot-high tunnel, said Jack Kuzar, a district manager with the federal Mine Safety and Health Administration.
CNN: Crews prepare for final rescue effort at Utah mine
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