主绝缘材料采用聚四氟乙烯在恒温恒湿无尘状态下，直接复合在导体上。
The main insulation material is the complex of PTPE combined on the conductor directly under the condition of constant temperature, constant humidity and dust free.
主绝缘材料采用聚四氟乙烯在恒温恒湿无尘状态下，直接复合在导体上。
The main insulation material is the complex of PTPE combined on the conductor directly under the condition of constant temperature, constant humidity and dust free.
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