Nguva pfupi yadarika, mumwe mutengi akaudza kuti vanowana mumwe mutengesi anovatora mutengo wakaderera weCarbon/Graphite Raschig Ring, dzimwe nguva vanokwezvwa nemutengo wakaderera wekutakura, pamwe nekuda kwekuti havanyatso ziva giredhi remhando yekutakura, nezvimwe.Isu tese tinoziva, inoita senge yakaderera mutengo wakachipa zvakanyanya, asi yavo yekutakura mhando ...
Verenga zvimwe