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Tunnel-boring machines may arrive in Chennai by August
'15 TBMs may be operated to build corridor-3, which has a 26 underground stretch with 30 stations, four TBMs each in corridor 4 and 5'
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://timesofindia.indiatimes.com/city/chennai/tunnel-boring-machines-may-arrive-in-city-by-aug/articleshow/90922877.cms
tbms: Tunnel-boring Machines May Arrive In City By Aug | Chennai News - Times of India
timesofindia.indiatimes.comConstruction of twin tunnels for operating driverless metro trains awaits the arrival of 23 giant tunnel boring machines (TBMs), likely by August. Of