Ponena za ntchito yomanga ndi kugwetsa, kukhala ndi zida zoyenera ndikofunikira kuti ntchitoyi ichitike bwino komanso mosatekeseka.Makamaka, ma jackhammer ndi zida zofunika zothyola konkriti, phula, ndi zida zina zolimba.Komabe, kuonetsetsa kuti ...
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