Pipe onigun jẹ iru orukọ fun paipu onigun mẹrin ati paipu onigun, iyẹn ni, awọn paipu irin pẹlu awọn gigun ẹgbẹ dogba ati aidogba.O ti yiyi lati irin rinhoho lẹhin itọju ilana.Ni gbogbogbo, irin adikala ti ko ni idi, ti ipele, yipo, welded lati ṣe paipu yika, yiyi i...
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