Kwenikweni, chida cha makina ndi chida cha makina owongolera njira yopangira zida - osati mwachindunji, chitsogozo chamanja, monga zida zamanja ndi pafupifupi zida zonse za anthu, mpaka anthu atapanga chida cha makina. Kuwongolera manambala (NC) kumatanthauza kugwiritsa ntchito malingaliro osinthika (zambiri mumtundu wa zilembo, manambala, ...
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