Qinghai solar street light brightness?
2021-02-19
ALLTOP
73
4, application more transparent electron optical components
generally through the lens, the special effects will damage the 20% to 30%, according to tempered laminated glass, and will damage the 15% 25%, so, if you have the lens and tempered laminated glass, the overall loss will be 35% to 55%, you may see the values did not dare to believe, but the objective facts in this way, application better lenses and tempered laminated glass, can reasonably reduce effects of harm, but can not be avoided.
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