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Heat transfer problems in electrical transformers have been analysed for more than 70 years.

传热问题，在电力变压器进行了分析，为70多岁。

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The electrical power grid is particularly vulnerable to these extra currents, which can infiltrate high-voltage transmission lines, causing transformers to overheat and possibly burn out.

相对于这些电流而言，电网极其脆弱。 这些电流混入高压传输线引起变压器过热且可能烧毁。

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Lightning-like flashes from exploding electrical transformers punctuated the night, often followed by the wail of emergency vehicles' sirens.

WSJ: Fierce Winds Batter California

PCBs were routinely used until about 25 years ago in the manufacture of a number of items, including electrical transformers.

FORBES: Surplus?

Main.net has found that even in the noisiest electrical environments, such as neighborhood transformers, there are always big enough gaps in the radio spectrum for repeaters to push a signal through.

FORBES: Technology