（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。） One covered yarn involves wrapping one layer of covering yarn close to a Main yarn, commonly spandex. This method results in a yarn that offers moderate elasticity and strength, rendering it well suited for many different apps. Air covered yarn utilizes the basic principle of compresse... https://carolp997doy8.wikihearsay.com/user