Flange na-abụghị ọkọlọtọ

Nkọwa dị mkpirikpi:

Oke ngwa: Okpomọkụ na arịa nrụgide, mmanụ ala, chemical ụlọ ọrụ, shipbuilding, ahịa ọgwụ, metallurgy, igwe, stamping ikiaka, nri na ndị ọzọ ọrụ.