1.1 Kukula kwa msika: mafuta monga gwero lalikulu lamagetsi, makina otchetcha udzu monga gulu lalikulu Zida zamagetsi zakunja (OPE) ndi zida zomwe zimagwiritsidwa ntchito makamaka pakukonza udzu, dimba kapena bwalo.Zida zamagetsi zakunja (OPE) ndi mtundu wa zida zamagetsi, zomwe zimagwiritsidwa ntchito kwambiri ngati udzu, dimba kapena ...
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