28.896 दृश्य
An expert team of engineers use hi-tech explosions and state-of-the-art drilling rigs to tear through solid granite and build an 11-mile underground tunnel, one of the longest in the world.
पहिलो एयर मिति : Jan 04, 2018
अन्तिम एयर मिति : Jul 01, 2020
एपिसोड : 29 एपिसोड
सीजन : 4 सीजन
रनटाइम: 45 मिनेट
स्टुडियो: Science
जात: Julian Barratt
चालक दल:
