*National Geographic - Megastructures Steel (2011) 720p HDTV
x264-TERRA*
English | 00:43:20 | H264 | 1280x720 | 25.00fps 3006 Kbps | AC3 128
Kbps 48.0khz | 931MB
*Genre:* Documentary
It's man made and one of the strongest materials on earth. Explore the
science behind steel and the innovations it has made possible from
the Brooklyn Bridge to the tools for medical miracles.
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