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而太阳光谱中紫外光区占不到5%，可见光区则占43%。
Because less then 5% of the sun spectrum is ultraviolet radiation and 43% is visible light.
youdao
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优质紫外光管，光谱稳定，晒版效果均衡；
High quality UV tube, stable spectrum, balance proofing effect;
youdao
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优质紫外光管，光谱稳定，晒版效果均衡；
High quality UV tube, stable spectrum, balance proofing effect;
youdao