Okokuqala, kufanelekile ukusetshenziswa: zonke izinhlobo zama-engeli ku-18-62mm valve zingasetshenziswa; Ipuleti lensimbi ozikhethela Isibili, ukubumba: ubuso obusebenzayo kanye ne-chamfering ephezulu nephansi yokucubungula; Okwesithathu, akukho ukugaya: indandatho yesihlalo se-valve ngemuva kokucubungula ngokuvamile ayidingi ukugaya, ingasetshenziswa ngokuqondile ne-valve entsha; Okwesine, ukuma okunembile: qinisekisa ukuthi isihlalo se-valve sisebenza nge-Angle, indawo ye-chamfer engaphezulu nephansi, ububanzi kanye ne-coaxiality nge-valve guide; Ukusetshenziswa okuhlanu: i-remer blade enobuthuntu…
