Phiri la mphira limapangidwa ndi mphamvu yayikulu ya mphira wachilengedwe, gawo lachitsulo lokhala ndi chithandizo chapadera chapamwamba, mphamvu yomangirira imafika 40kg/C.Moyo wotopa ndi wabwino kwambiri, woyenera mitundu yonse ya jenereta yaying'ono, pampu, mota ndi makina a centrifugal.Kuyikako ndikosavuta ndipo kufotokozedwa kwake ndi kwakukulu.Akunja awiri ndi 8mm kuti 150 mm akhoza kukumana mitundu yonse ya zida akutali.