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http://www.txtmania.com/trivia/inventions.php

http://www.kabayancentral.com/book/anvil/mb271022x.html

http://inventors.about.com/od/filipinoscientists/a/Gregorio_Zara.htm

2007-03-02 04:44:57 · answer #1 · answered by cmhurley64 6 · 0 0

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