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Our design has solved this problem by detailed changes. First of all, usually buttonholes are horizontal, we put the button hole sewing into one horizontal and one vertical, and changed the button’s back modeling: vertical holes corresponding to the back button is smooth, and the transverse holes corresponding to the button’s back transverse a tiny projections as well, so when we tie the button we naturally will touch protrusions then we know we have to correspond the horizontal buttonhole. This does not affect the appearance and solves the wrong tie of the button. Thus, we will never be worry about this problem.
Jinchi Che Zhiliang Zhen Qize Song Hao Qin