The 2 major yarns don't have to be of exactly the same kind; distinctive fibers and specifications may be employed to attain the desired qualities. This information aims to drop gentle around the variations in between both of these elements, their employs, and their characteristics. （一）Introduction Ahead of diving into… https://covered-elastic-yarn37135.aioblogs.com/85054546/the-basic-principles-of-covered-spandex-yarn