Ukufakwa kwangaphandle nangaphakathi ezindaweni ezimanzi nezimanzi, ukuxhumanisa amayunithi okubonisana nokulawula embonini, ezitimeleni, ezimpawini zethrafikhi, eziteshini zamandla okushisa kanye nezamanzi. Zibekwa emoyeni, emihubheni, emiseleni, ezibakaki zokusekela insimbi noma emhlabathini ngqo, uma zivikelwe kahle.


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