内容标题5

  • <tr id='UiByvJ'><strong id='UiByvJ'></strong><small id='UiByvJ'></small><button id='UiByvJ'></button><li id='UiByvJ'><noscript id='UiByvJ'><big id='UiByvJ'></big><dt id='UiByvJ'></dt></noscript></li></tr><ol id='UiByvJ'><option id='UiByvJ'><table id='UiByvJ'><blockquote id='UiByvJ'><tbody id='UiByvJ'></tbody></blockquote></table></option></ol><u id='UiByvJ'></u><kbd id='UiByvJ'><kbd id='UiByvJ'></kbd></kbd>

    <code id='UiByvJ'><strong id='UiByvJ'></strong></code>

    <fieldset id='UiByvJ'></fieldset>
          <span id='UiByvJ'></span>

              <ins id='UiByvJ'></ins>
              <acronym id='UiByvJ'><em id='UiByvJ'></em><td id='UiByvJ'><div id='UiByvJ'></div></td></acronym><address id='UiByvJ'><big id='UiByvJ'><big id='UiByvJ'></big><legend id='UiByvJ'></legend></big></address>

              <i id='UiByvJ'><div id='UiByvJ'><ins id='UiByvJ'></ins></div></i>
              <i id='UiByvJ'></i>
            1. <dl id='UiByvJ'></dl>
              1. <blockquote id='UiByvJ'><q id='UiByvJ'><noscript id='UiByvJ'></noscript><dt id='UiByvJ'></dt></q></blockquote><noframes id='UiByvJ'><i id='UiByvJ'></i>
                为什么切断阀应尽量选用硬密封?
                发布时间:2015-11-12
                切断阀︼要求泄露越低越好,软密封∩的泄露是最低,切断阀效果当然好幾百玄仙沖了過去々,但不耐磨,可靠性差,从泄漏量对密封及可靠性的双重标准来看,软密封切断就不→如硬密封切断好。

                --切断阀要求泄露越低越好,软密封的泄露是最低,切断阀效果当然好,但不耐磨,可靠性差,从泄漏量对密封及可靠性的双重标准来看,软密封切断就不如硬密封切ζ断好。