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In life,you may come across a embarrassment thing:forget to fasten zipper?The trousers zippers design nowaday:buttons and zippers are independent,unrelated.This will make people forget to fasten zipper inadvertently,resulting in embarrassment.Meanwhile,split design also increase costs.Combine using integrated design,zippers and buttons are combined together.When people put on trousers, zipper is open,button also remain low location,so if people want to fasten button must to fasten zipper firstly(pull button to high location),so we will never forget to fasten zipper.It will avoid people to appears to the embarrassment that not fasten zippper.
Xuan Teng Huijun Chen