Ndi chitukuko chofulumira cha zomangamanga m'zaka zaposachedwa, zitsulo zazitsulo zakhala zikugwiritsidwa ntchito kwambiri.
Steel springboard ndi mtundu wa zida zomangira pantchito yomanga. Nthawi zambiri, imatha kutchedwa zitsulo zopangira zitsulo,
zomangamanga zitsulo matsuko, chitsulo chopondaponda, kanasonkhezereka zitsulo masika, kanasonkhezereka zitsulo pedal, ndipo analandiridwa bwino ndi shipbuilding
mafakitale, nsanja yamafuta, magetsi amagetsi ndi mafakitale omanga.
Nthawi yotumiza: May-07-2021