verbindungswinkel between seat and backrest of a chair, od. etc.

• 1. 座椅框架与靠背之间具有柔性连接件的座椅 [P] . 中国专利： CN204444951U . 2015-07-08
• 2. 一种座椅靠背和椅子的可调节连接器 [P] . 中国专利： CN209983821U . 2020.01.24
• 3. chair or seat with adjustable rueckenlehne, such as lean or deck chair, fahrzeugsitz od. etc. [P] . 德国专利： DE000001283460A . 1968-11-21

  机译： 可调节rueckenlehne的椅子或座椅，例如，倾斜或躺椅，fahrzeugsitz od。等等

• 4. padded backrest for seats of od. etc. [P] . 德国专利： DE000008510279U1 . 1985-08-14

  机译： od座位的靠背。等等

• 5. backrest for vehicle seats od. etc. [P] . AT183662B . 1955-11-10

  机译： 座椅靠背od。等等

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• 5. Effects of the Ball-backrest Chair Combined with an Accelerometer on the Painand Trunk Muscle Endurance of a Computer Worker with LBP [O] . Won-gyu Yoo 2014
• 6. Figure 6: (A) The pressure index of human-chair backrest interface; (B) the pressure index of human-chair seat pan interface. [O] . -1

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