[EIDXA] Can you explain this

[Glenn Thorne]

It's an extension of the basic blivet design.

On 6/6/2013 12:01 PM, Tom wrote:
> Lots of engineers in this club.  Can anyone figure out how this works???
>
>
> http://www.bitoffun.com/video_vault/escherian-stairwell.htm
>
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