Koj puas paub?!?Iav Insulator yog dab tsi?!Ntev ua ntej lub caij nyoog niaj hnub no ntawm cov khoos phis tawj, xov tooj ntawm tes, smartphones, fiber ntau-optic cables thiab hauv internet, kev sib txuas lus ntev hluav taws xob / hluav taws xob muaj feem ntau ntawm xov tooj thiab xov tooj.Raws li lub sij hawm mus, tes hauj lwm ntawm "qhib hlau" telegrap ...
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