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    <description>Latest 20 threads of 蒸汽撒沙系统</description>
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      <title>机车撒沙方法</title>
      <link>http://zqxhc.com/forum.php?mod=viewthread&amp;tid=126</link>
      <description><![CDATA[机车在爬坡或者拉载量过大时候，驱动轮容易在轨道打滑，一般用蒸汽将沙箱中储备的细沙吹到轨道上增大摩擦力来防止打滑。见图：]]></description>
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      <author>cassie</author>
      <pubDate>Mon, 03 Jul 2017 06:18:25 +0000</pubDate>
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