I-roller yesango elishelelayo yenziwe ngensimbi, ingangeni manzi, ingagqwali futhi ihlala isikhathi eside ukuyisebenzisa.
Isondo elislayidayo lohlobo lwe-V lizivumelanisa nebanga lokushisa elibanzi.
Amandla aphezulu, ukuqina okuhle, ukukhasa okuphansi, ukumelana nemihuzuko kanye nokuzinza kwamakhemikhali.
Ingadambisa ukudlidliza, akukho msindo nokusebenza kahle.
Ikakhulukazi engasindi, ukugcinwa okulula.