Kutsutsa kwamankhwala
Mitundu ya fiberglass imakhala ndi kukana kosangalatsa, mphamvu zapamwamba kwambiri, kupsinjika kwamphamvu, kusanja kwamphamvu komanso kusungirako, ndikugwiritsa ntchito madzi, kuwononga madzi, etc.
Zogulitsa Zogwirizana: Kugwedeza mwachindunji, ulusi wambiri, wosadulidwa mphaka, nsonga, matlet