N'otu oge, ọtụtụ elu-ọkwa nchara na nnukwu dayameta ịgbado ọkụ-pipe mills e wuru na etinyere n'olu, otu nke abụọ ERW24 '' ogologo onuete ịgbado ọkụ anwụrụ mills na ndị kasị ibu n'obosara na anụ ụlọ China maka Liaoyang Large Pipe Company na Guangzhou Juyi Steel Pipe Co.
