flanschverbindung two cross-section rectangular luftkanalteilstuecke from sheet.

• 1. 一种连接矩形风管的矩形法兰装置 [P] . 中国专利： CN203797194U . 2014.08.27
• 2. 矩形截面通风管道法兰成型模具 [P] . 中国专利： CN2369852Y . 2000.03.22
• 3. elbow to flanschverbindung of cross-section of rectangular klimatisierungskanälen o.dgl. [P] . 德国专利： DE000002265555C2 . 1981-11-19

  机译： 弯管与矩形空调管道等横截面的法兰连接。

• 4. Method for connecting channels, preferably ventilation ducts with rectangular cross-section and a set of devices for connecting channels, preferably ventilation ducts with rectangular cross-section [P] . PL411179A1 . 2016-08-16

  机译： 用于连接通道，优选地具有矩形横截面的通风管道的方法和用于连接通道，优选地具有矩形横截面的通风管道的装置

• 5. ALUMINUM ALLOY PLATE FOR RECTANGULAR CROSS-SECTION BATTERY CONTAINER AND ALUMINUM ALLOY PLATE RECTANGULAR CROSS-SECTION BATTERY CONTAINER [P] . 日本专利： JP2007305597A . 2007-11-22

  机译： 矩形横截面电池容器用铝合金板和矩形横截面容器的铝板

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