autores Belsley, M. FILOMENA MARIA DA ROCHA MENEZES DE OLIVEIRA SOARES Rosa Maria Castro Fernandes Vasconcelos Carvalho V Belsley, M. Vasconcelos, R.M. Soares, F.O.
palavras-chave Impulse frequency determination Walsh – Hadamard Yarn hairiness Yarn irregularities Yarn periodical errors