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Metal filaments that emit electrons in a fluorescent lamp. Negatively charged free electrons emitted by the cathode are attracted to the positive electrode (anode), creating an electric current between the electrodes.

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行业/领域：灯具照明
类别照明产品
Company: GE
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Dragan Zivanovic

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行业/领域：天气类别气象

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1. A violently rotating column of air, in contact with the ground, either pendant from a cumuliform cloud or underneath a cumuliform cloud, and often ...