Kupyolera mu thiransifoma, kutsika kwamagetsi kumakhala kochepa, kuwonjezeka kwaposachedwa, kutentha kwa kutentha zowumitsa zokhamakina onyamula sangagwiritse ntchito thumba lathyathyathya kuchita anagula makina odzaza vacuum, koma ayenera kugwiritsa ntchito thumba la tirigu, osagwiritsa ntchito thumba lathyathyathya (
Pogwiritsa ntchito thumba lathyathyathya, silingathe kupukuta)
, ndizovuta kwambiri.

