涤氨包缠纱是一种以涤纶长丝为外包纤维，氨纶长丝为芯线的氨纶弹力纱。
The wrapped yarn of polyester and spandex takes polyester filament as outer wrapping fiber and spandex as core fiber.
最常用的包芯纱之一是芯部采用弹力丝(例如氨纶)，表层使用短纤维。
One of the most common types of core - spun yarns is that involving a core of a stretch filament such as spandex with a covering of staple fibers.
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