Ndi chitukuko chofulumira cha zomangamanga m'zaka zaposachedwa.
ma springboards achitsulo akhala akugwiritsidwa ntchito kwambiri. Steel springboard ndi mtundu wa zida zomangira pantchito yomanga.
Nthawi zambiri, angatchedwe zitsulo scaffolding bolodi, zomangamanga zitsulo kasupe, chitsulo chopondaponda, kanasonkhezereka zitsulo masika, kanasonkhezereka zitsulo pedal,
ndipo imalandiridwa bwino ndi makampani opanga zombo, nsanja yamafuta, mphamvu yamagetsi ndi zomangamanga.
Nthawi yotumiza: Sep-03-2021