Right Tunnelling is a SET-listed Thai infrastructure-tunnelling specialist contractor for Bangkok mass-transit (MRT) and inter-province rail projects. Specialises in TBM (tunnel-boring machine) operations.
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<img src="https://prideshow.org/api/badge/ranking/2026-q2/right-tunnelling-public-company-limited?style=seal" alt="Ranked #286 in PrideShow Ranking 2026-q2" width="150" />