Umbhobho wentsimbi engenamthungo uyamelana nomoya, umphunga, amanzi kunye nezinye izinto ezibuthathaka ezityiwayo kunye neasidi, ialkali, ityuwa kunye nezinye iikhemikhali zokurhweba okuphakathi kombhobho wentsimbi, udonga olungqindilili, lunoqoqosho ngakumbi kwaye lusebenza, ukutyeba kodonga kuncipha kakhulu. , iindleko zayo zokulungisa ziya kunyuka kakhulu.Xa ukugoba, amandla e-torsional afanayo, ubunzima obulula, ngoko ke ikwasetyenziswa ngokubanzi ekwenzeni iinxalenye zoomatshini kunye nezakhiwo zobunjineli.