Makina opanga okhawo opanga okha ndi zida zofunikira komanso zofunikira mu malonda amakono. Pofuna kuonetsetsa kuti zida za zidazi, zikusintha bwino zopanga ndikuwonetsetsa kuti ali ndi chitetezo, tili ndi mawonekedwe
Makina kolondola konkriti, omwe amatchedwanso makina opanga konkriti, zida zofunikira mu malonda omanga. Adapangidwa kuti atulutse zokongoletsa bwino komanso mosasinthasintha. Makinawa asintha pakapita nthawi, kuphatikizapo T
Pali mitundu yambiri yamakina njerwa pamsika, yomwe ili mu makina a njerwa yotchedwa konkrite block. Koma kodi mukudziwa za chizindikiritso cha makina ogona njerwa? Kodi mukudziwa zomwe zilembo za njerwa zikuyimira?
Chifukwa cha mgwirizano wokwanira ndi thandizo la gulu lokhazikitsa ma polojekitiyi, ntchitoyi ikupita molingana ndi nthawi yokonzedwayo, ndipo kukhazikitsa kwatsirizidwa bwino.