다음 채널에서 시청 가능: Philo, Hulu
시즌 1, 에피소드 1: Tory Belleci and Streetbike Tommy meet experts using cutting-edge explosives to turn entire mountains into gravel-sized bits essential for construction, and their investigation reveals the high-powered, hi-tech process behind this dangerous work.
Educational · 2020년 1월 1일 · 42분