3908 Polyamides, in primary forms

3908 (01/1988-..) Polyamides, in primary forms 39081000 (01/1988-..) Polyamides-6, -11, -12, -6,6, -6,9, -6,10 or -6,12, in primary forms 39089000 (01/1988-..) Polyamides, in primary forms (excl. polyamides-6, -11, -12, -6,6, -6,9, -6,10 and -6,12)