Umfanekiso wokuqala yi-bollard yokuphakamisa ngokuzenzekelayo, izitayela ezahlukeneyo, ezinye zisemgangathweni, ezinye zenziwe ngokwezifiso.Umfanekiso wesibini zii-bollards ezilungisiweyo kunye nee-bollards ezigobileyo, ezenziwe ngensimbi engenasici okanye i-carbon steel, enombala.Umfanekiso wesithathu luluhlu lwezinto ezitshixwayo zokupaka kunye ...
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