https://timesofindia.indiatimes.com/city/chennai/15-tbms-to-be-used-in-chennai-metros-phase-2-project-named-after-mountains-and-rivers/articleshow/98047765.cms
CHENNAI: 15 tunnel boring machines (TBM) that will build twin-tunnels from Venugopal Nagar to Taramani covering 28.
https://timesofindia.indiatimes.com/city/chennai/15-tbms-to-be-used-in-chennai-metros-phase-2-project-named-after-mountains-and-rivers/articleshow/98047765.cms
15 TBMs to be used in Chennai metro's phase-2 project named after mountains and rivers | Chennai News - Times of India
timesofindia.indiatimes.comCHENNAI: 15 tunnel boring machines (TBM) that will build twin-tunnels from Venugopal Nagar to Taramani covering 28.