The idea came from Bret Mogilefsky (bmog.blogspot.com/2011/12/home...) This video is just an explanation of how the flaps work together.
Негізгі бет Dog Door Flap
The idea came from Bret Mogilefsky (bmog.blogspot.com/2011/12/home...) This video is just an explanation of how the flaps work together.
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