umthombo wesithombe :ngu-adrian-motroc ku-Unsplash Uma uhlela ukupakishwa kwezimonyo ngendlela oyifisayo, ukukhetha kwempahla kudlala indima ebalulekile ekuqinisekiseni ikhwalithi, ukuqina, nokukhanga kobuhle bomkhiqizo wokugcina. Phakathi kwezinketho ezihlukahlukene ezitholakalayo, i-PCTG (i-polycyclohexanedimethyl terephthalate) isibe yi-po...
Funda okwengeziwe