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28th November 2013, 06:25 PM
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#4 |
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(deceased)
Join Date: Dec 2004
Location: Portugal
Posts: 9,694
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After a quick browsing ...
It seems as these things were not that uncommon in the Great Wall arsenals.
More uncommon appears to be nowaday's knowledge of how they worked in those days  http://www.greatwallforum.com/forum/...te-cannon.html I still call them fantastic ... almost unbelievable 
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