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GB/T 31840.1-2015 额定电压1kV(Um=1.2kV)到35kV(Um=40.5kV) 铝合金芯挤包绝缘电力电缆 第1部分:额定电压1kV (Um=1.2kV)和3kV (Um=3.6kV)电缆 |
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