heading method of tunnelling

Игры ⚽ Нужен реферат?

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
Tunnel — This article is about underground passages. For other uses, see Tunnel (disambiguation). Underground tunnel for heatpipes between Rigshospitalet and Amagerværket in Denmark … Wikipedia
Channel Tunnel — Map of the Channel Tunnel Overview Location English Channel (Strait of Dover) Coordinates Folkestone … Wikipedia
Pennsylvania Turnpike — This article is about the east west mainline and Northeast Extension of the Pennsylvania Turnpike system, commonly referred to simply as the Pennsylvania Turnpike. For the agency overseeing the Pennsylvania Turnpike system, see Pennsylvania… … Wikipedia
The Blitz — London Blitz redirects here. For the London based American football team, see London Blitz (American football). For other uses, see Blitz (disambiguation). The Blitz Part of Second World War, Home Front … Wikipedia

Словари и энциклопедии на Академике