Conduit for electrical wiring ; arches for steel armoured conduits and plain conduits 电气布线用导管.钢制铠装管和普通管用的弯管头
General specifications for plain conduits of flame - retardant pvc plastics for electrical installations 电气安装用阻燃pvc塑料平导管通用技术条件
Specification for conduits for electrical installations . part 2 : particular specification for rigid plain conduits of insulating materials 电气设备用导管规范.第2部分:普通刚性绝缘材料导管的特殊规范
Conduits and fittings for electrical installation ; rigid non - flame propagating insulating conduits and fittings , plain conduits couplers and bends for medium and heavy pressure strength 电气设备用导管和配件.第1部分:刚性耐火传导式绝缘导