Imbali ye-UL
Ngeminyaka yee-1890, kwabakho umlilo omkhulu eUnited States.Unobangela ibingumbane.Ukuthintela ezinye iintlekele, uMnu. William h.UMerrill waseka ngokusesikweni i-UL (underwriters laboratories) ngo-1894. NgoMatshi 24, 1894, yapapasha ingxelo yayo yokuqala yovavanyo kwaye yaqalisa umsebenzi wayo wokukhusela ukhuseleko.UL yi-US yovavanyo lokhuseleko lwemveliso kunye ne-arhente yokuqinisekisa kunye nomsunguli wemigangatho yokhuseleko lwemveliso yase-US. Ngaphezulu kwekhulu leminyaka, i-UL iye yavavanya imigangatho yokhuseleko kumakhulu eemveliso kunye namacandelo.
UL eTshayina
Kwiminyaka eyi-30 + edlulileyo, i-UL igxile ekukhuleni okwenziwe e-China.Xa i-UL ingena e-China kwi-1980, yaseka ubudlelwane obuhle bokubambisana kunye nokuhlolwa kwe-China kunye ne-certification (iqela) co., LTD.(CCIC) .Ubambiswano lwaqala ngokubonelela ngeenkonzo zokulandelela iifektri zaseTshayina kunye nokunceda iimveliso zaseTshayina zingene kwimarike yaseNyakatho yaseMelika.Kwiminyaka eyi-10 edlulileyo, i-UL ityalomali kakhulu kumaziko asekuhlaleni kunye nokwakha iqela leenjineli ukubonelela ngokulula, ngokukhawuleza kunye nokukhawuleza. iinkonzo ezigqwesileyo zasekhaya kubakhiqizi baseTshayina.Kuzwekazi laseTshayina, iifektri ezingaphezulu kwama-20,000 kunye nabavelisi baye baqinisekiswa nge-UL, inombolo yenkonzo yokuqinisekisa i-UL 0755-26069940.
Uhlobo lwamanqaku e-UL
Ubungakanani obuqhelekileyo bophawu lwe-UL
Anbotek UL egunyazisiweyo
Okwangoku, i-Anbotek ifumene isigunyaziso se-WTDP se-ul60950-1 kunye ne-UL 60065, oku kuthetha ukuba zonke iingqikelelo kunye neemvavanyo zobungqina zingagqitywa kwi-anbotek, ukunciphisa kakhulu umjikelo wesatifikethi.Isiqinisekiso sogunyaziso sika-Anbotek simi ngolu hlobo lulandelayo.
