Sered dị ka fumace tubes, okpomọkụ mgbanwe tubes na pipeline na mmanụ ala na refinery osisi.

A na-eji ya na-emepụta ọkpọkọ mgbidi mmiri na-ekpo ọkụ, mmiri ọkụ na-esi ísì ụtọ, ọkpọkọ uzuoku na-ekpo ọkụ na-ekpo ọkụ, ọkụ ọkụ na-ekpo ọkụ maka ndị na-ekpo ọkụ na-ekpo ọkụ, nnukwu na obere anwụrụ ọkụ na ọkpọkọ brik, wdg.