The construction of the tunnel is being conducted by the Iranian company Farab Group
https://en.irna.ir/news/85189701/Iran-to-complete-construction-of-major-tunnel-in-Tajikistan
cover tunnel photo by: Matt Brown from London, England / CC BY
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https://en.irna.ir/news/85189701/Iran-to-complete-construction-of-major-tunnel-in-Tajikistan
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