● Izinhlayiya eziminyene, ukumelana nezinga lokushisa eliphezulu, ukumelana nokugqwala, amabala akukho ndawo yokucasha
● Ukunwebeka okuphezulu, ukwelula kwamahhala ngaphandle kokuguqulwa, ukuvikela amanzi kanye nokuvikela uwoyela
● Idizayini yokulenga, ukonga isikhala, ukuvikela isandla kuvikeleke kakhulu
● I-concave yangaphakathi ne-convex, ntofontofo futhi engasheleli, ukuvikela ukushisa nokunakekela izandla zakho