Zvimiro zvemagiya ehonye:
1. Inopa raios huru yekuderedza daro rakatarwa pakati
2. Chiito chekubatanidza meshing chakapfava uye chakatsetseka
3. Hazvigoneki kuti vhiri remuswe rifambise mota kunze kwekunge mamwe mamiriro ezvinhu asangana
Pfungwa yekushanda kwemidziyo yehonye:
Mitsetse miviri yegiya rehonye nedhiraivha rehonye yakatarisana; honye inogona kuonekwa se helix ine zino rimwe (musoro mumwe chete) kana mazino akawanda (misoro yakawanda) yakasungirirwa padivi pe helix iri pa cylinder, uye giya rehonye rakaita se oblique.giya, asi mazino ayo anofukidza gonye. Panguva yekubatanidza, kutenderera kamwe chete kwegonye kunofambisa vhiri regonye kuti ritenderere nepazino rimwe chete (gonye rine magumo maviri) kana mazino akawanda (gonye rine magumo akawanda).tsvimbo, saka chiyero chekumhanya i chegonye giya rekutumira = huwandu hwemisoro yegonye Z1/huwandu hwemazino evhiri regonye Z2.