Ubunini bwibintu ni 0.8-1.0mm, 1.0-1.2mm, 1.2-1.5mm. Ubunini buri hagati yimashini imwe. Imiterere ya Torrist, uruhande rumwe rushobora kwimuka no guhindura ubugari
1.Yingyee afite injeniyeri inararibonye azi gukemura nibindi bibazo.
2.Gutanga igishushanyo cyamashanyarazi, PLC ihindura icyerekezo na videwo, gutanga roller ihindura- videwo; gutanga ibishushanyo bya muzingo nibiba ngombwa.