User talk:149.216.89.153
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Regarding the articles Silicon dioxide and Fused quartz: Please do not add commercial links (or links to your own private websites) to Wikipedia. Wikipedia is not a vehicle for advertising or a mere collection of external links. You are, however, encouraged to add content instead of links to the encyclopedia. See the welcome page to learn more. Thanks. Yansa 13:56, 27 April 2006 (UTC)
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