Na-adigide & nchekwa: jiri ezigbo igwe kwụ ọtọ, ọ dị oke mkpa ma na-adịgide adịgide. Mpempe akwụkwọ rọba na-eme ka ergonomic na-ejide ergonomic kwa ụbọchị, kwụsie ike na nke na-anaghị efegharị, na-abawanye nkasi obi na nchekwa. Ọ bụrụgodị na nkwụ na-asụ ọsụsọ, enwere ike ijide ya nke ọma.