TY - GEN ED - SRI LANKA STANDARDS INSTITUTION TI - SLS 821 : Part 4 : 1990 : Low frequency cables and wires with PVC insulation and PVC sheath for telecommunication : Part 4 - Equipment wires with solid or stranded conductors unscreened in pairs, triples,quads, quintuples PY - 1990/// CY - Colombo PB - SLSI KW - a621.315.21:678.743 KW - SRI LANKA-STANDARDS KW - STANDARDS-SRI LANKA N1 - STD2961 ER -