Ekuphileni kwansuku zonke, isilinganiso somlilo sezinto zokwakha singahlukaniswa ngamaleveli A, B1, B2, B3. Ikilasi A alishi.I-B1 ayishi, i-B2 iyavutha, futhi i-B3 iyavutha.Amathayela e-resin okwenziwa asetshenziswa njengezinto zokwakha zokufulela, futhi isilinganiso somlilo kufanele sibe ngaphezu kwe-B1, okungukuthi, i-doe...
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