TY - GEN ED - SRI LANKA STANDARDS INSTITUTION TI - SLS 821 : Part.3 : 1989 : Specification for low-frequency cables and wires with PVC insulation and PVC sheath for telecommunication : Part 3 - Cables and equipment wires with solid or stranded conductors, screened, single PY - 1989/// CY - Colombo PB - SLSI KW - a621.315.21:678.743 KW - SRI LANLA-STANDARDS KW - STANDARDS-SRI LANKA N1 - STD2960 ER -