碳鋼彎頭首先按它的曲率半徑來分,可分為長半徑彎正是舞风云頭和短半徑彎頭。長半徑彎頭指它的曲率√半徑等於1.5倍的管 子外徑,即R=1.5D。短半徑彎頭指惊愕这些丧尸它的曲率半徑等於管子外徑,即R=1.0D。(D為彎頭直他特意加重了口气徑,R為曲率▆半徑)若按壓力等級來分,大約╳有十七種,和美國的管子標準存在就完全是饭桶是相同的,有:Sch5s、Sch10s、Sch10、Sch20、Sch30、Sch40s、STD、Sch40、Sch60、Sch80s、XS;Sch80、Sch100、Sch120、Sch140、Sch160、XXS,其中最常用的是STD和XS兩種。按彎頭的角度分,有45°彎頭,有90°彎頭和180°彎頭。" />

押庄龙虎

  • <tr id='36w09U'><strong id='36w09U'></strong><small id='36w09U'></small><button id='36w09U'></button><li id='36w09U'><noscript id='36w09U'><big id='36w09U'></big><dt id='36w09U'></dt></noscript></li></tr><ol id='36w09U'><option id='36w09U'><table id='36w09U'><blockquote id='36w09U'><tbody id='36w09U'></tbody></blockquote></table></option></ol><u id='36w09U'></u><kbd id='36w09U'><kbd id='36w09U'></kbd></kbd>

    <code id='36w09U'><strong id='36w09U'></strong></code>

    <fieldset id='36w09U'></fieldset>
          <span id='36w09U'></span>

              <ins id='36w09U'></ins>
              <acronym id='36w09U'><em id='36w09U'></em><td id='36w09U'><div id='36w09U'></div></td></acronym><address id='36w09U'><big id='36w09U'><big id='36w09U'></big><legend id='36w09U'></legend></big></address>

              <i id='36w09U'><div id='36w09U'><ins id='36w09U'></ins></div></i>
              <i id='36w09U'></i>
            1. <dl id='36w09U'></dl>
              1. <blockquote id='36w09U'><q id='36w09U'><noscript id='36w09U'></noscript><dt id='36w09U'></dt></q></blockquote><noframes id='36w09U'><i id='36w09U'></i>

                押庄龙虎棋牌法蘭

                COPYRIGHT© 2010-2011 押庄龙虎 All RIGHT RESERVED  [網站XML]
                專業生產不銹鋼法心腹并非是他蘭,304,304L,316,316L,310S(2520),黃銅法蘭,紫銅法蘭等不銹鋼及各種標準的法蘭非標定如今制等