TY - GEN ED - SRI LANKA STANDARDS INSTITUTION TI - SLS 821 : Part 2: 1988 : Specification for low-frequency cables and wires with PVC insulation and PVC sheath for telecommunication : Part. 2 - Equipment wires with solid or stranded conductors , unscreened , single PY - 1988/// CY - Colombo PB - SLSI KW - a621.315.21:678.743 KW - SRI LANKA-STANDARDS KW - STANDARDS-SRI LANKA N1 - STD2959 ER -