ゴム紐の事で困り事等がある場合は、何でも気軽に質問・ご相談ください。 One covered yarn consists of wrapping an individual layer of masking yarn all over a Main yarn, typically spandex. This method ends in a yarn that offers moderate elasticity and toughness, making it appropriate for a range of apps. 弾性糸に、下糸（左側）が巻かれ、その上にさらに上糸（右側）が巻かれているのが分かります... https://marvinr123dxq8.blogmazing.com/profile