Amalungu erabha ngamalungu enziwe ngerabha, ipholima yendalo eyaziwa ngokunwebeka, ukomelela, kunye nokuqina.Amalungu erabha asetyenziswa kwizicelo ezahlukeneyo kuwo wonke amashishini afana neemoto, ulwakhiwo, i-aerospace, kunye neemveliso zabathengi.Olunye uphawu oluphambili lwamalungu erabha kukunwebeka kwawo okanye ukuguquguquka.Irabha inesakhono esisodwa sokuzolula kwaye emva koko ibuyele kwimo yayo yokuqala, iyenza ilungele usetyenziso apho iindawo zifuna ukufunxa ukothuka okanye ukungcangcazela.