mains Network frequency 电源频率
AMN Artificial Mains Network 人工电源网络
artificial mains network 人工电源网络
public mains network 公共电网
artifical mains network 等效电网
line artificial-mains network 人工电源网络
Artificial mains network impedance 人工电源网络阻抗
Northern Gas Networks said it was replacing ageing metal gas mains with plastic equivalents to "reduce gas leakage and enhance network reliability".
BBC: Generic water works
Ofgem said that the increase in allowances compared with their July proposal was because the regulator had agreed to let gas network firms charge more for the cost of replacing gas mains.
BBC: Ofgem permits ?12 energy bills rise for grid upgrade
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