足球的最后一张皮子是如何缝上的？
是通过一种特殊的针缝好的。你可以看一下的全文。但是， 很可惜没有发现图片。
How Most Hand Stitched Soccer Ball Parts are Put Together
The first stage is to roll out the material to be used for the outing casing of the ball. The casing is usually made from several layers of synthetic foam-filled leaves (panels), which are glued (laminated) together to produce a tough, smooth exterior.
The leaves are cut into the exact amount needed to make one ball. Then the panels are pre-printed with any brand names and graphics before being cut. All logos would be printed at this point in the process. Printing is typically accomplished by silk-screening onto the cover material. After printing, the material may have another layer of clear urethane (or another proprietary material) applied over the printing for protection.
The number of individual panels required are then cut out, and holes are pre-punched in preparation for stitching. The stitching is performed by turning the ball inside out, so none of the stitches show on the outside. A different type of needle is used to complete the stitching of each panel, which effectively makes the final knot 'disappear'.
参考资料：http://www.soccerballworld.com/Construction.htm#how
