Concrete Challenge

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Uploaded by on Jun 19, 2008

Concrete is laid down to create a rat slab, enabling builders to build up and down at the same time.

LA Hard Hats: Rodbusters :
SUN AUG 3 9P et/pt : http://channel.nationalgeographic.com/index.html/?source=4003

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  • likes, 12 dislikes

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Top Comments

  • I love National Geographic clips - they're almost all really interesting - but 36 seconds? That's way too short to be interesting.

  • who watches tv anymore?

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All Comments (19)

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  • They're teasers so that you watch the channel on cable.

  • Good Grief, what a concept. Sure wish I could see the rest of this. Their segment here was extremely brief... :)

  • Lol!

  • Lol!

  • it's all good, but you weren't even the first comment :)

  • o.k , interesting !

  • hehe srry I cant resist. :)

  • Hey National Geographic I advise you to extend the length of these videos next time please thanks.

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