Conduits for electrical installation ; flexible plain and non inflammable conduits of insulating material for medium pressure load 电气设备用导管.中等压力负荷用绝缘材料制柔性难燃普
2.
Conduits for electrical installation ; flexible plain and non inflammable conduits of insulating material for middle and light pressure load 电气设备用导管.第1部分:中型和轻型压力负荷用绝缘材
3.
Conduits and fittings for electrical installation ; flexible corrugated and non inflammable conduits of insulating material for light pressure load and a heat resistance up to 105 c 电气设备用导管和配件.第3部分:轻型压力负荷和耐热温