[youtube width=”640″ height=”480″]https://www.youtube.com/watch?v=hNLqyhkBYP0[/youtube]

[youtube width=”640″ height=”480″]https://www.youtube.com/watch?v=quUCCq83i2s[/youtube]

[youtube width=”640″ height=”480″]https://www.youtube.com/watch?v=WOienCYl__c[/youtube]

[youtube width=”640″ height=”480″]https://www.youtube.com/watch?v=6_vkPWoojhc[/youtube]

Vedi anche: La ricostruzione del ponte-tubo del Vajont realizzata dalla Società Terni