Anyị isi ngwaahịa bụ elu-ugboro ogologo onuete welded ígwè ọkpọkọ na abụọ-kwadoro submerged arc welded ígwè ọkpọkọ, wdg, nke na-ọtụtụ ebe na-eji na ọkara na obere nsogbu mmiri nnyefe pipeline dị ka mmanụ, eke gas, mmiri, uzuoku, gas. wdg, yana structural ígwè ọkpọkọ maka pil ...
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