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      <title>Historia de los materiales by jair arce</title>
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      <pubDate>2021-08-30 00:12:49 UTC</pubDate>
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         <title>EDAD DEL COBRE</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703098171</link>
         <description><![CDATA[<div>5000 a 1500 A.C.</div>]]></description>
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         <pubDate>2021-08-30 00:31:46 UTC</pubDate>
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         <title>EDAD DE BRONCE</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703109868</link>
         <description><![CDATA[<div>3100&nbsp;a 300 A.C.</div>]]></description>
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         <pubDate>2021-08-30 00:36:56 UTC</pubDate>
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         <title>EDAD DE HIERRO</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703117128</link>
         <description><![CDATA[<div>1200 A.C. a 1950 D.C.</div>]]></description>
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         <pubDate>2021-08-30 00:40:12 UTC</pubDate>
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         <title>REVOLUCION INDUSTRIAL</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703124870</link>
         <description><![CDATA[<div>1760 a 1840 D.C.</div>]]></description>
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         <pubDate>2021-08-30 00:43:33 UTC</pubDate>
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         <title>DESARROLLO DE LA CIENCIA DE LOS MATERIALES</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703157534</link>
         <description><![CDATA[<div>1800 a 1950 D.C.</div>]]></description>
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         <pubDate>2021-08-30 00:57:00 UTC</pubDate>
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      <item>
         <title>ACTUALIDAD, ¿ERA DEL SILICIO O ERA DE LOS POLIMEROS?</title>
         <author>jairarce123</author>
         <link>https://padlet.com/jairarce123/38mo9l56tgyg3rfc/wish/1703171578</link>
         <description><![CDATA[<div>Silicio: 1958 hasta la actualidad<br>Polímeros: 1909 hasta la actualidad</div>]]></description>
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         <pubDate>2021-08-30 01:02:48 UTC</pubDate>
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