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GB/T 31840.2-2015 额定电压1kV(Um=1.2kV)到35kV(Um=40.5 kV) 铝合金芯挤包绝缘电力电缆 第2部分:额定电压6kV(Um=7.2kV)到30kV(Um=36kV)电缆 |
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