Milankovitch invented and patented new and useful Improvement in the Production of hollow reinforced-concrete slabs AT 42720 B
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Milankovitch invented and patented new and useful Improvement in the Production of hollow reinforced-concrete slabs AT 42720 B
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.