（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。） Solitary covered yarn requires wrapping a single layer of covering yarn all-around a Main yarn, generally spandex. This process leads to a yarn that offers average elasticity and energy, which makes it ideal for a variety of purposes. 弾性糸に、下糸（左側）が巻かれ、その上にさらに上糸... https://trumanm023cwo6.mappywiki.com/user