- MICROTUNNELLING MACHINE
- آلة الانفاق الصغيرة
English-Arabic construction engineering dictionary. 2015.
MICROTUNNELLING MACHINE
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Microtunnel boring machine — Microtunnel Boring Machines (MTBM) are used for microtunneling.They are very similar to tunnel boring machines but on a smaller scale. These machines generally vary from 24” to 60” but smaller and larger machines have existed. The main… … Wikipedia
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
