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.
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