Rivet otu-drum bụ ụdị ihe e ji emechi ihe n'ìhè ọhụrụ. Ngwaahịa a nwere njirimara nke ojiji dị mma, ezigbo mmiri anaghị amịpụta, arụmọrụ dị elu, obere mkpọtụ, ma nwee ike ibelata ike ọrụ. Mgbe a gbasasịrị ya, otu drum ga-emepụta drum, isi ya ga-anọgidekwa na rivet ahụ. Drum otu ígwè nke ụlọ ọrụ anyị mepụtara nwere teknụzụ na ọrụ aka siri ike, ọ dịkwa na ngwaahịa ruo ogologo oge.
Oge ozi: Maachị-29-2021