6517: Yarn of regenerated fibres, not for retail sale

65171: Yarn of continuous viscose rayon, not for retail sale 65172: Yarn of any continuous acetate fibres not for sale 65173: Yarn of oth.continuous regenerated textiles fibres 65174: Yarn contain.85% by weight.discontinous regenerated fibres 65175: Yarn of discontinous <85% regenerated fibres, mixed wood cotton 65176: Yarn of discontinous <85% regenerated fibres, mixed wool 65177: Yarn mixed with fibres other than cotton, wool, etc. 65178: Monofil & imitation.catgut of regenerated fibres materials 6517: Yarn of regenerated fibres, not for retail sale