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Please Let Me Know How Much You Like This (1 is very Bad - 10 is Excellent)

Telescopic sliding windows 2

Two pink pulleys rotate on pivots of the blue panel.

Green pannel is fixed to lower cable branch.

Upper cable branch is fixed to the wall.

The green panel moves twice faster than the blue one.

Cable tension device is not shown.

The video shows back view of the window.

Disadvantage: The two panels are not on the same level.

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