Gravity-Powered Sewer Genius
13:22–13:46 · 24s
Belgrand’s elegant engineering: using Paris’s natural slope to keep wastewater moving without pumps, calibrated to three centimeters per meter—safe enough that a man wouldn’t slip.
13:22–13:46 · 24s
Belgrand’s elegant engineering: using Paris’s natural slope to keep wastewater moving without pumps, calibrated to three centimeters per meter—safe enough that a man wouldn’t slip.
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