deep mine उदाहरण वाक्य
उदाहरण वाक्य
- There are no deep mines operating in Van Lear proper, although some mines operate nearby.
- Major growth came in the mid-19th century, with the development of deep mining.
- From 1997 until 2003 he was the director of the Pennsylvania Bureau of Deep Mine Safety.
- Deep mining ceased in 1965 with the closure of Foxfield Colliery by the National Coal Board.
- The last deep mine in South Wales closed when the coal was exhausted in January 2008.
- In December 1915, 250th Tunnelling Company began work on the deep mine at Petit Bois.
- Extensive deep mining took place in the watershed of Rausch Creek in the early 20th century.
- We believe the closing of this is the beginning of the end of the deep mining industry.
- "It's fair to say the deep mine rescuers will be ready,"
- With falling air pressure, gases trapped within the coal in deep mines can escape more freely.