Nk’uko byatangajwe na komisiyo mpuzamahanga y’ubucuruzi muri Amerika (USITC), Minisiteri y’ubucuruzi muri Amerika…
Ibyuma bitagira umwanda nizina ryahawe ibyuma-binini cyane, bikoreshwa cyane cyane muburyo bwo kurwanya ruswa. Ikintu nyamukuru kiranga ibyuma bitagira umwanda ni uko byose birimo byibuze chromium 10.5%.
Ijanisha rya karubone mubyuma bigira ingaruka zikomeye, imbaraga za elastique no guhindagurika kwicyuma. Icyuma cyoroheje, kizwi kandi nkicyuma cyoroheje, gifite imiterere isa nicyuma, ariko cyoroshye kandi cyoroshye gukora.
Ibyuma bishyushye bishyushye bikomatanya bifatika hamwe nuburanga.Bigizwe na tin, chrome, zinc cyangwa irangi, ibyo bikaba byongeweho byongeweho bikoreshwa mubyuma bisanzwe.
Aluminium hamwe ninshi mu bivangavanze birwanya cyane uburyo butandukanye bwo kwangirika.Uyu mutungo watumye aluminiyumu ikundwa cyane mu bwubatsi, ubwubatsi bwo mu nyanja n’ubwikorezi.
Imiyoboro yicyuma ni miyoboro miremire ikoreshwa muburyo butandukanye.Byakozwe nuburyo bubiri butandukanye butuma imiyoboro isudira cyangwa idafite kashe kugirango ikoreshwe ahantu hatandukanye.
Ibyuma byibyuma bifite uburyo butandukanye bwo gukoresha hamwe nuburyo butandukanye mubikorwa byinganda. Ubwoko butandukanye bwibigize amavuta ashobora gushiramo ibyuma, bigatuma biba ibintu byinshi cyane kugirango bikore ibyuma bya karubone ninkoni zidafite ingese.
Inkoni y'icyuma ni ubwoko bw'icyuma gishyushye gishyizwe mu byiciro. Birashobora kuba ibyuma bya karubone cyangwa ibicuruzwa bitagira umwanda. Umugozi ukoreshwa nk'ibikoresho bifata, amasoko, imiyoboro, imigozi y'insinga hamwe na meshi.
Ibyuma bifite ibintu byinshi bitandukanye, bitewe nibindi bintu bibigize.Icyuma ni kimwe mu bikoresho bikoreshwa cyane mu nganda zikoreshwa mu nganda ndetse n’ibyuma bikoreshwa cyane ku isi.
Impuzandengo y'ibicuruzwa n'ibisabwa yarahagaze, kandi isoko ry'ibyuma mu Bushinwa ryongeye kwiyongera kuva muri Nyakanga