1. Amaphethini ahlukahlukene angalingiswa ngokuzenzakalelayo, ngombala ogqamile, asetshenziswe njenge-veneer yamapaneli asekelwe enkuni kanye nezinkuni, ezinobunzima obuphezulu, ukumelana nokugqoka kanye nokumelana nokushisa okuhle.2. Ukumelana namakhemikhali kujwayelekile, futhi kungamelana nokuhuzuka kwama-asidi avamile, ama-alkali, uwoyela, utshwala a...
Funda kabanzi