Xa kuziwa ekukhetheni phakathi kwe-PU yesikhumba kunye nesikhumba sokwenyani, isigqibo asisoloko sicacile. Zombini ezi zixhobo zibonelela ngeengenelo ezahlukeneyo, kodwa nazo ziza nemingeni yazo. Kwiminyaka yakutshanje, isikhumba sePU, esikwabizwa ngokuba yi-polyurethane yesikhumba, sifumene ukuthandwa okubalulekileyo, es...
Funda ngokugqithisileyo