Packing：
紫外线杀菌灯实际上是属于一种低压汞灯。低压汞灯是利用较低汞蒸汽压(<10-2Pa)被激化而发出紫外光，其发光谱线主要有两条:一条是253.7nm波长;另一条是185nm波长，这两条都是肉眼看不见的紫外线
Ultraviolet germicidal lamp is actually a kind of low pressure mercury lamp. The low-pressure mercury lamp uses the lower mercury vapor pressure (< 10-2Pa) to excite and emit ultraviolet light. There are two main emission lines: one is the wavelength of 253.7nm; the other is the wavelength of 185nm, both of which are invisible to the naked eye
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