I think this is no problem. This is a good one. This one belongs to infrared induction automatic expansion and contraction, but now infrared induction is patented.
Infringement comes first, rights protection comes later, how can works that do not collect design fees make money? If you don't protect your legitimate interests, then the merchants will make money by selling money for white prostitution!
There is mass production
Ask a question, what principle? Gravity support. If it is a gravity bracket, the structure is obviously irrational.
Great!
Good appearance
Praise