1.Ukuphefumla Ukuphefumla kufuneka kuqwalaselwe iiseyile, ngakumbi iiseyile zomkhosi. Izinto ezichaphazelayo zokungena komoya ziquka isakhiwo se-substrate, ukuxinana, izinto eziphathekayo, uhlobo lwesicoci esingenamanzi, i-resin adhesion, njl. Ngokunyuka kwe-resin adhesion, i-air permeabili...
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