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 可以试着从窗扇的光启和勾起上面的滑轮调节螺丝孔上调节 如果您动手能力够强,可以把窗扇拿下来,把装有滑轮的下方卸下来调节。 滑轮上都有螺丝可调节高低的哦!

You can try to adjust the screw hole from the window fan and the pulley to adjust the screw hole. If you have enough hands-on ability, you can take the window sash down and unload the underneath of the pulley. There are screws on the pulley to adjust the height.
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