Ma IP ratings, kapena Ingress Protection ratings, amakhala ngati muyeso wa kukana kwa chipangizo kulowetsa zinthu zakunja, kuphatikiza fumbi, dothi, ndi chinyezi. Wopangidwa ndi International Electrotechnical Commission (IEC), njira yoyezera iyi yakhala mulingo wapadziko lonse lapansi wowunikira ...
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