Giant Bowling Balls Clean Sewers
14:10–14:33 · 23s
Alexa describes Jules Verne–like maintenance tech: massive rolling balls blasted through tunnels to scrub them—a method used until 1995.
14:10–14:33 · 23s
Alexa describes Jules Verne–like maintenance tech: massive rolling balls blasted through tunnels to scrub them—a method used until 1995.
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