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India’s first underwater train in Kolkata to be operational this year,2023.

India’s first underwater train in Kolkata to be operational this year,2023.

tathyathetruth April 14, 2023

India’s first underwater train is an engineering marvel that connects the mainland of Kolkata with the island...

India’s first underwater train in Kolkata to be operational this year,2023.

India’s first underwater train in Kolkata to be operational this year,2023.

tathyathetruth April 14, 2023

India’s first underwater train is an engineering marvel that connects the mainland of Kolkata with the island...