Zoyeserera ndi zigawo zamakina zomwe zimagwiritsidwa ntchito kuti mulumikizane, kukonza, kapena ziwalo zomata, ndipo zimagwiritsidwa ntchito mosiyanasiyana m'makina, zomanga, mafaloni, ndi mafakitale ena. Zamitundu yosiyanasiyana ndi zida zamakampani, othamanga amatha kuonetsetsa chitetezo, kudalirika, komanso kukhazikika ...
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