yetion1
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« on: December 29, 2011, 06:09:24 pm » |
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It is always interesting to read the pros and cons surrounding this subject. From my un-educated view based on what little I have seen one tunnel was cut in to solid rock yet appeared to go up and down in depth according to how this stone layer had been formed. Also every 12 ish metres the tunnel turned left and then back to the right in a zigzag. The rock tunnel was circular perhaps to act as its own brace? There is no doubt there was technology that is lost today.
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