Mitundu iwiri ya zida zokutidwa ndi ufa yomwe imagwiritsidwa ntchito ndi helix imodzi ndi helix. Makampani ambiri amafuna kuti mapasa - Chongani mukamagwiritsa ntchito zida zokutira. Chifukwa ntchito yogwira ntchito ya ufa wokutidwa ndi v
1. Mphamvu yophimba nyengo ndi kutentha kwa mafilimu okutidwa ndi 170 - 200g / magetsi a mfuti ya 70kv, ndi chinthu chomwe chikuyenera kukhala ndi 20cm e