Fluorescent is a low pressure mercury-smoke arc discharge lamp.

日光灯是一种低气压的汞蒸气弧光放电灯。

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A low-pressure mercury vapor discharge lamp is operable in a first mode of operation ('normal mode') and a second mode of operation ('emergency operation').

低压汞汽放电灯操作在第一操作模式（“正常模式”）和第二操作模式（“紧 急操作”）下。

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A low-pressure mercury vapor discharge lamp is operable in a first mode of operation ('normal mode') and a second mode of operation ('emergency operation').

低压汞汽放电灯操作在第一操作模式（“正常模式”）和第二操作模式（“紧 急操作”）下。

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