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			    <title>htm021的个人空间</title>
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			    <lastBuildDate>Wed, 19 Nov 2008 20:12:49 GMT</lastBuildDate><item>
								<title>蝶阀的各种分类方式</title>
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<P><STRONG>1．按结构形式分类</STRONG></P>
<P>　　(1)中心密封蝶阀<BR>　　(2)单偏心密封<A href="http://www.buy-valve.com/pv.asp?ie=3">蝶阀</A><BR>　　(3)双偏心密封蝶阀<BR>　　(4)三偏心密封跺阀</P>
<P><STRONG>2．按密封面材质分类...]]></description>
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								<author>htm021</author>
								<pubDate>Wed, 28 May 2008 10:56:00 GMT</pubDate>
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