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The so-called “part-degree†refers to the ability of the shoe upper to have the ability to revert after basic rulings such as raising, dropping, and filling up. However, in order to make shoes more practical, In the curved form, wherever there is a joint between parts, the degree of twist required to fit the shape of the part where the part is located can be given. This local degree of turbulence, called the component twist, is not controlled by the strain angle. In general, the component twist has the following characteristics: “1. The appearance of the component twist in the exhibition plane is the separation of the component outline lines, ie, an outline between two parts of a shoe, in the exhibition plane. Two different outline lines are used to express the component twist between them, and in the process of production, the two lines should be merged into a complete component outline. At this time, this part of the upper must be a curved surface, with the actual surface. Similarly, after the upper parts have been treated with twist, the surface is stable in shape and will not be deformed, so the molding effect is very good.2.The position of the twist of the component is, in principle, the place where the joint of the two components is located. The actual bending characteristics of the surface, given the appropriate component twist (referred to as the component 跷), but the component twist also brings some difficulties to the processing, not to mention that some parts and components, the twist is not obvious. The degree and method of twisting are not conclusive. Under normal circumstances, part twists are mainly manifested between the Baotou and the middle gang, between the tongue and the front outline line, and on both sides of the front cover. Between help Wai, the seam between the front and the rear to help in the inner and outer arms to help in the slit member. · The old shoes at home are like this to transform big spikes · Old shoes don't stupidly throw away so that the shoes "open" Put a physical insurance on your shoes · How to clean the matte surface of the shoes? · Breathable, antibacterial, deodorizing socks with it to avoid off shoes ·Sports shoes's little tail actually has these 3 functions you certainly don't ·High-heeled shoes audio sound? 4 coups to ease you learn a few ·How to choose shoes during pregnancy? Flat shoes are not safe What should I do if my shoes become moldy ·Wearing these shoes in the summer will hurt you