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Submarine | naval vessel | Britannica

Submarine: Submarine, any naval vessel that is capable of propelling itself beneath the water as well as on the water’s surface. This is a unique capability among warships, and submarines are quite different in design and appearance from surface ships.

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Recent research in seismology in South Africa - SciELO

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New Uranium Mining Projects - Africa

New Uranium Mining Projects - Africa (last updated 13 Mar 2018) Contents:

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Tasks. Skills. Recommendation. Activity: Thinking about materials and their properties. Accessing and recalling information, classifying and sorting. Suggested

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Glossary of Mining Terms - rocksandminerals

Back — The roof or upper part in any underground mining cavity. Backfill — Mine waste or rock used to support the roof after coal removal. Barren — Said of rock or vein material containing no minerals of value, and of strata without coal, or containing coal in seams too thin to be workable.

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Mine Health and Safety Regulations, NWT Reg (Nu) 125 …

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Pit Terminology - Glossary - Mines Rescue

You can also check the Durham Mining Museum and Ian Winstanley's Site. I have also used 'A Pit Terminology - Glossary Used in Coal Mining' a publication compiled by William Stukeley Gresley, dated 1883 and given to me by Philip Wyles.

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Reflection seismology - Wikipedia

Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves.

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Glossary of Mining Terms - Coal Education

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back ...

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Recent research in seismology in South Africa - SciELO

ABSTRACT. This paper summarizes the most important developments in South African research in earthquake, exploration and mine seismology for …

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Davy lamp - Wikipedia

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Fifty Orwell Essays

contents. the spike (1931) a hanging (1931) bookshop memories (1936) shooting an elephant (1936) down the mine (1937) (from “the road to wigan pier”)

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Submarine | naval vessel | Britannica

Submarine: Submarine, any naval vessel that is capable of propelling itself beneath the water as well as on the water’s surface. This is a unique capability among warships, and submarines are quite different in design and appearance from surface ships.

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