India to Develop Own Tunnel-Boring Machines if China Halts Supplies: Piyush Goyal - Union Commerce and Industry Minister Piyush Goyal stated that India is prepared to develop its own tunnel-boring machines (TBMs) ... Get Latest News on Technology only on lokmattimes.com. This assertion comes amidst recent export restrictions from Beijing, with Goyal emphasizing that India will not compromise its strategic interests.