TY - BOOK ED - Sri Lanka standards institution TI - Outside diameters of conduits for electrical installations and threads for conduits and fittings: SLS 989 : 1993 T2 - Gr U1 - B1495 PY - 1993/// CY - Colombo PB - Sri Lanka standards institution KW - BOOKS BOX B1495 KW - FACTORY TESTING KW - QUALITY CONTROL KW - SLC CERTIFICATION KW - SLS KW - SRI LANKA STANDARDA INSTITUTION KW - TEST METHODS ER -