DIN 49019-3:1975
电气设备用导管和配件.第3部分:轻型压力负荷和耐热温度可达 105℃ 的绝缘材料的柔性波纹导管与非易燃导管
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