Ngwa ngwa: ụdị nzacha onwe onye nnapụta, gas nchọpụta ngwá ọrụ, uzuzu mkpuchi, Ngwuputa raincoat, mi blaster, ngwa nkọwa: nkwonkwo bolts na-ọtụtụ ebe: ala okpomọkụ na elu mgbali valves, mgbali pipelines, mmiri engineering, mmanụ ala ala na mmepụta akụrụngwa, A na-ejikarị akụrụngwa mmanụ na mpaghara ndị ọzọ eme ihe n'ịkwasa na oge njikọ ma ọ bụ ngwaọrụ dị ka ụlọ ọrụ valve, igwe mpịaji, ụgbọ nwa. N'ihi ịdị mma na ngwa ngwa iji bolts dị ndụ, iji bolts na-akwado na-arụ ọrụ njikọ na ntinye. Obosara na mbara.