the innenrohr and a special stulp dichtungsnut formed in double rohrwaermeaustauschern whose mantelrohr with the innenrohr weld is

• 1. 一种用于安装管式换热器中内套管的安装机构 [P] . 中国专利： CN105729370A . 2016-07-06
• 2. 一种用于安装管式换热器中内套管的安装机构 [P] . 中国专利： CN205521149U . 2016.08.31
• 3. innenrohr for double chimneys [P] . 德国专利： DE000001683738A . 1971-02-25

  机译： 双烟囱innenrohr

• 4. innenrohr for double chimneys [P] . 瑞士专利： CH445809A . 1967-10-31

  机译： 双烟囱innenrohr

• 5. method for forming a überdicke at the ends of the innenrohrs a joint according to the forms and its applications. [P] . AT122128T . 1995-05-15

  机译： 的方法，根据形式和应用，在无筋关节的末端形成筋。

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