（この画像の場合は、芯ゴムは、天然ゴム糸で、カバード糸は、上糸も下糸もポリエステル糸の生成色です。） Single covered yarn requires wrapping just one layer of covering yarn all over a core yarn, typically spandex. This process brings about a yarn that gives reasonable elasticity and power, making it suited to a variety of programs. This kind of yarn is solely a innovation which might be https://jonathanw356lfx0.newbigblog.com/profile