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Spiral welded ígwè anwụrụ
A na-eji eriri igwe na-eme spral steel pipes site na eriri igwe, extrusion na-etolite n'okpuru ọnọdụ okpomọkụ, wee were teknụzụ nke waya abụọ na ihu abụọ ihu submerged-arc welded.
A na-eji eriri igwe na-eme spral steel pipes site na eriri igwe, extrusion na-etolite n'okpuru ọnọdụ okpomọkụ, wee were teknụzụ nke waya abụọ na ihu abụọ ihu submerged-arc welded.