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Coal.
Tags:
metal, metallurgy, mine, coal   ( 4 ... )
Updated: 12 Apr 2010
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Keyword analysis

 
metal   6062
 
metallurgy   3021
 
mine   2994
 
coal   265
Keywords are search requests to search engines that people use to find some information. Keywords on a web page reflect what the page is about. Below are the keywords the site. Green line represents the frequency of keyword usage on the site.

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