BS 6564-1-1.2:1989 Polytetrafluoroethylene (PTFE) materials and products. Polytetrafluoroethylene powders for moulding and extrusion-Method of specifying
1989BS 6564-1-1.2:1989 Polytetrafluoroethylene (PTFE) materials and products. Polytetrafluoroethylene powders for moulding and extrusion-Method of specifying