CHOICES OF FLAME RETARDANT MATERIALS FOR
2015-10-27u2002·u2002insulation 4. External smoothsemi- conducting layer 5. Screen, formed by a wire layer wrapped around the insulator 6. Laminated aluminium foil 7. Composite external sheath, halogen free and flame retardant, with a semi conductive coating. 4 1 6 7 2 5 3
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