（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 entails wrapping an individual layer of masking yarn all-around a Main yarn, usually spandex. This process leads to a yarn that gives average elasticity and energy, which makes it ideal for a variety of purposes. This kind of yarn is just a innovation which have been https://wilhelmk912xqi4.wiki-cms.com/user