Ngokuthuthuka kwemboni yesimanje, izingxenye zemishini (ezifana nemishini yezolimo, imishini yezimayini, imishini yokwakha, imishini yokumba, njll.) zivame ukusebenza ngaphansi kwezimo eziyinkimbinkimbi nezinzima, futhi inqwaba yemishini yemishini ivame ukuchithwa ngenxa yokuguga nokuklebhuka. .Lapho...
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