Txawm hais tias nws yog UV-A, UV-B, UV-C, thiab lwm yam bands, lossis UV-V nrog lub wavelength saum 390nm, lawv tseem muaj suav tsis txheeb lub hwj chim zoo kawg nkaus uas yuav tshwm sim.Nrog rau kev txhim kho thev naus laus zis, daim ntawv thov kev ua haujlwm yuav raug hloov kho tas li thiab hloov kho dua tshiab.Thaum lub caij ntuj sov los, ...
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