Ma coil amtundu wa vacuum wambiri wosanjikiza, mawonekedwe opangira matenthedwe otsika kwambiri, makina okonza vacuum apamwamba. Ndipo njira yabwino yochotsera vacuum yamagawo angapo imathandizira kuyamwa kwazinthuzo.
Kukweza kwaukadaulo kwatsopanoKulumikizana kwapadera kwa chikhodzodzo chamkati ndi kunja, mawonekedwe odalirika, kuonetsetsa chitetezo cha ntchito
