Elastomeric of polyurethane, single, untwisted or with a twist not exceeding 5 turns per metre, not put up for retail sale 氨纶弹性单纱(未加捻或捻度每米不超过50转,非供零售用),
Other elastomeric yarn of synthetic filaments, single, untwisted or with a twist not exceeding 5 turns/m, not put up for retail sale 其他合成纤维长丝弹性单纱(非供零售用,未加捻或捻度每米不超过50转),