Ivyo ni ibikorwa vyinshiamahasa y'ugusohora ibifungurwaivyo bihejeje gukoranya no kuba bigeragezwa imbere y’uko bishika ku mukiriya wacu w’Abahindi. Izokoreshwa mu guhingura umuceri w’ingaburo y’abantu igihe . Kwongerako, Ishobora gukora ibifungurwa vyo mu nzu, ibifungurwa vy’ifi, n’ibindi hamwe.
Ni vyo ubwoko bushasha bw’amahasa bukoresha imirongo y’ivyuma n’amaboko y’ivyuma. Ubuvuzi buzimya umuriro buzimya umwuka{6}} Igikoresho c’ivyuma gifata gearbox izwi cane ya Nanjing mu Bushinwa ifise ibiranga ubuzima bwiza n’ubudahemuka maremare.
