Chionioni chekumashure hachisi chionioni chakafuratira, asi chionioni checonvex.Nzvimbo yekuona girazi rekumashure inotsamira pazvinhu zvitatu: chinhambwe chiri pakati pemaziso emutyairi negirazi rinoratidza kumashure, ukuru hwegirazi rinoratidza kumashure, uye curvature radius yegirazi rinoratidza kumashure.Zvinhu zviviri zvekutanga zvakamisikidzwa kana kusadzoreka, uye chinonyanya kukanganisa chiratidziro ndechekudzika kwegirazi rekumashure.Iyo idiki iyo curvature radius yegirazi pamusoro, iyo yakakura iyo inoratidzwa yekuona nzvimbo, asi panguva imwecheteyo, iyo yakakura dhigirii ye deformation yechinhu chakaratidzwa, uye kure kure kubva kure chaiko, izvo zvinogona kukonzera nyore kunyengera kwemutyairi.Naizvozvo, iyo curvature radius yechiso chegirazi ine muganho unotsanangurwa neindasitiri zviyero.Inoti zvakare nzvimbo yekuisa yekunze girazi rekumashure haifanire kudarika ekunze 250mm yemotokari.
