As part of Delhi Metro's phase-IV project, the first tunnel boring machine (TBM) on the under construction Aerocity-Tughlakabad corridor began work on Friday...
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https://infra.economictimes.indiatimes.com/news/urban-transportation/first-tbm-work-begins-on-aerocity-tughlakabad-line-under-delhi-metros-ph-iv-project/98392268
First TBM work begins on Aerocity-Tughlakabad line under Delhi Metro's Ph-IV project - ET Infra
infra.economictimes.indiatimes.comAs part of Delhi Metro's phase-IV project, the first tunnel boring machine (TBM) on the under construction Aerocity-Tughlakabad corridor began work on Friday, officials said.