Ilaphu lokuntywila, elaziwa ngokuba zizinto zokuntywila, luhlobo lwefoam yerabha eyenziweyo, ethambileyo, ethambileyo nethambileyo. Iimpawu kunye nobubanzi bokusetyenziswa: ukumelana nemozulu elungileyo, ukumelana nokuguga kwe-ozone, ukuzicima, ukumelana neoyile elungileyo, okulandela irabha ye-nitrile kuphela, ukuqina okugqwesileyo...
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