Igrayiti yensimbi ngoku isetyenziswa kumashishini ahlukeneyo ngeendlela ezahlukeneyo, ezifana neplatifti zesakhiwo sentsimbi, izigqubuthelo zomsele, iinkqubo zokuhambisa amanzi, izitebhisi zentsimbi, iisilingi zokwakha, njl.njl ...
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