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This window prevents cat living in high-rise residence and other items in high-rise residence from falling down from the window. Cats are very willing to play in front of the window. These people will be afraid of opening the window because of worring about thier cat falling from the window.The cat may be attracted by things outside and jump out the window. It is danguagous and they may even lose their life.
The window can open to 90 degree. There is metal screen for window which is accordion and can be taken in the window frame when the window is closed. On sunny day, the cat can play here and enjoy the sunshine.
Shanghai Second Polytechnic University