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Ukusetshenziswa kabusha kwezinsimbi ezingezona i-ferrous kudlala indima ebalulekile embonini yokusetshenziswa kabusha kwesandla sesibili kanye nemfucuza, ukunikeza isixazululo esimeme sokuphatha izinto ezingafuneki. Izinsimbi ezingezona i-ferrous, njenge-aluminium, ithusi, nethusi, zibaluleke kakhulu ngenxa yezakhiwo zazo nokusebenza okuhlukahlukene. Ukuphindaphinda lezi zinsimbi kusiza ukulondoloza izinsiza zemvelo, ukunciphisa ukusetshenziswa kwamandla, nokunciphisa imvelo i