Kuti mudziwe ngati kubera kungagwiritsidwe ntchito kachiwiri, m'pofunika kuganizira kuchuluka kwa kuwonongeka, makina, kufunikira, zochitika zogwirira ntchito, kayendetsedwe ka kayendetsedwe kake, ndi zina. Ma bearings omwe adasokonekera panthawi yokonza zida ...
Werengani zambiri