不绝缘物体 uninsulated object

不绝缘的管 bare pipe

绝缘不良 bad insulation ; insulation fault ; defective insulation ; insulation damaged

不良绝缘 defective insulation ; poor insulation

不燃绝缘体 non-inflammable insulator

不燃绝缘材料 non-combustible insulation material ; non-combustible i ulation material

不良绝缘子 [电] poor insulator

钢轨绝缘不良 bad rail insulation

不导电的、绝缘的 dielectric