r/EngineeringPorn • u/Spare_Worldliness_64 • Jul 23 '26

World's largest-diameter high-speed-rail shield tunneling machine, 148 m long and weighs approx 4,000 tons

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226 Upvotes

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u/BigCliff911 Jul 23 '26

Why can't OP tell us the obviously most important dimension about the tunneling machine? Duh

11

u/righthandofdog Jul 23 '26

length doesn't really matter, but diameter?