- chalk quarrying
- <min> ■ Kreideabbau m
English-german technical dictionary. 2013.
chalk quarrying
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Chełm Chalk Tunnels — The Chełm Chalk Tunnels (in Polish Chełmskie podziemia kredowe) are a system of tunnels dug into the chalk under the city of Chełm in eastern Poland. The tunnelling was begun in the Middle Ages for chalk extraction but was discontinued in the… … Wikipedia
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tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening … Universalium
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Stone carving — is an ancient activity where pieces of rough natural stone are shaped by the controlled removal of stone. Owing to the permanence of the material, evidence can be found that even the earliest societies indulged in some form of stone work.Work… … Wikipedia
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