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Concrete production and drought

105 bytes added, 23:51, 4 June 2012
Reference manuals, videos, and links
==Reference manuals, videos, and links==
* Concrete poker vibrator (commercial product). Found at [http://www.alibaba.com/showroom/portable-concrete-poker-vibrator.html Alibaba.com.]
* Video: [http://www.howcast.com/videos/155401-How-To-Mix-Concrete-By-Hand How to mix concrete by hand.]
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