Bollards ndi gawo lofunikira pachitetezo chilichonse.Amagwiritsidwa ntchito poyang'anira njira zolowera m'malo, kuteteza oyenda pansi ndi magalimoto kuti asagundane, ndikupereka chotchinga chakuthupi kwa olowa.Ma bollards amabwera mosiyanasiyana, makulidwe, ndi zida, ndipo amatha kugwiritsidwa ntchito ...
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