(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 entails wrapping one layer of masking yarn about a core yarn, generally spandex. This process brings about a yarn that offers average elasticity and strength, making it suited to a variety of programs. 弾性糸に、下糸(左側)が巻かれ、その上にさらに上糸(右側)が巻... https://abbien417wxy5.blogitright.com/profile