Mtengo wamkati wa mpunga umakhudza kwambiri magwiridwe antchito ndi chitetezo {{0} {} {chitsulo,
{1. aluminium aloy miphika yamkati
Ophika achinsinsi amagwiritsa ntchito mawu a aluminium a aluminiyamu a aluminiyamu mkati mwamizinda yayikulu kwambiri ndi zochulukirapo, zomwe zimapangitsa kuphika motenthedwe Zakudya za acidic kapena nsomba za alkaline pakuphika, komanso kudzera pakutsuka mobwerezabwereza, komwe kumatha kutsogolera ndi chakudya {{5}
Miphika yambiri yamkati pamsika imakhala ndi makulidwe osakwana 1 {} 2 mm oyeretsa Abranes kuti aletse kuvala.
2. miphika ya chitsulo mkati
Miphika yosapanga dzimbiri yamkati imakomezedwa kuti ikhale yolimbana ndi kutentha kwamphamvu kwambiri. {{8}
{3. compleite ambiri miphika
Miphika yambiri yamkati ndi yofunika kwambiri yophika mikate yambiri, yomwe imaphatikiza zinthu zingapo kuti muchepetse mphamvu za aliyense, ndikupanga magwiridwe antchito a aliyense,
4. posankha zokutira
Kuphatikiza pa zinthu zamkati zamkati, kusankha kophatikiza ndikofunikira .} Makhalidwe {4}
Kusankha kwa Mpunga wa Mpunga Umkati kumagwirizana kwambiri ndi mtengo wa mpunga {{5} nthawi zonse}