Idizayini yephethini ye-concave fold eyingqayizivele iqinisekisa indawo yokuhlunga engu-100% ephumelelayo kanye nokusebenza kahle okukhulu. Ukuqina okuqinile, kusetshenziswa ubuchwepheshe obuthuthukile bangaphandle ukuze kulungiswe okunamathelayo okukhethekile kwekhatriji yesihlungi ukuze kuhlanganiswe. Isikhala esigoqeka kahle siqinisekisa ukuhlungwa okufanayo kuyo yonke indawo yokuhlunga, kunciphisa umehluko wengcindezi yesici sokuhlunga, kusimamise ukugeleza komoya egumbini lokufutha, futhi kusize ukuhlanzwa kwegumbi lempushana. Ingaphezulu eligoqayo linoguquko olugobile, okwandisa indawo yokuhlunga esebenzayo, kukhulisa ukusebenza kahle kokuhlunga, futhi andise impilo yesevisi. Inothe ngokunwebeka, ubulukhuni obuphansi, indandatho eyodwa yokuvala indandatho.