IiGraders zizixhobo zokwakha ezinzima ezinencakuba ende esetyenziselwa ukulinganisa nokugudisa umhlaba, nokudala umphezulu othe tyaba ukwenzela umsebenzi wokwakha owongezelelekileyo.Ii-Graders zisetyenziswa kakhulu kulwakhiwo lweendlela nokugcinwa kwazo, kodwa zinokusetyenziswa kuluhlu lwamanye amashishini ngokunjalo, afana nemigodi, amahlathi, ezolimo, kunye nokulungisa umhlaba.Nantsi indlela iigradi ezisetyenziswa ngayo ngokuqhelekileyo:
Lilonke, iigreyidi zizixhobo ezibalulekileyo kulwakhiwo kunye namanye amashishini ahlukeneyo afuna ukugudiswa kunye nokuphakanyiswa komhlaba.Ukuguquguquka kwazo, ukusebenza kakuhle nokusebenza kwazo kuzenza zibe zizixhobo ezibalulekileyo kuwo nawuphi na umsebenzi wokwakha.
IZIXHOBO | IMINYAKA | ISIXHOBO UHLOBO | IINKETHO ZEZIXHOBO | ISIHLUNGI ENTJINI | UKHETHO LWENJINI |
Inombolo yento yemveliso | BZL- | |
Ubungakanani bebhokisi yangaphakathi | CM | |
Ubungakanani bebhokisi yangaphandle | CM | |
Ubunzima betyala lonke | KG |