Maboti okhala ndi theka ndi ma bolt a ulusi wonse: Sankhani zomangira zolondola kuti kulumikizanako kudali kodalirika.
M'magawo monga kupanga makina, uinjiniya womanga, ndi mafakitale amagalimoto, ma bolts, monga zomangira zofunika kwambiri, magwiridwe antchito awo komanso zochitika zomwe zikugwira ntchito zimakhudza mwachindunji chitetezo ndi kukhazikika kwa zida. Komabe, pamaso ...
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