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exploratory shaft造句

"exploratory shaft"是什么意思   

例句與造句

  1. An attack tunnel is dug in response, and the Australians successfully destroy the exploratory shaft with minutes to spare.
  2. In 1968 the drillers were once again brought out to the property and another exploratory shaft was sunk into the ground.
  3. From November 1989 until the end of 1992 exploratory shafts and galleries were dug, tunnelling proper lasted from July 1993 until early 1995.
  4. The lateral alignment of the revised tunnel route was the same as the planned deeper route, and this left the ten exploratory shafts intersecting the tunnel and continuing as pits up to 6 metres deep below the tunnel floor.
  5. It was known that coal existed at Torbanlea, a site north-west of Maryborough, since at least the late 1860s, with exploratory shafts being sunk and then abandoned intermittently until James Robertson, a mine engineer from Scotland, identified a potentially profitable deposit and floated a company, the Torbanlea Colliery Company, to mine it.
  6. It's difficult to find exploratory shaft in a sentence. 用exploratory shaft造句挺難的

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