Kuyang'ana pafupipafupi tsiku lililonse ndikofunikira kuti muwonetsetse kuti pillar jib crane ikugwira ntchito moyenera. Asanayambe kugwiritsa ntchito, ogwiritsira ntchito ayenera kuyang'anitsitsa mbali zazikuluzikulu, kuphatikizapo mkono wa jib, mzati, kukwera, trolley, ndi maziko. Onani zizindikiro za ...
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