Ke hofe ho molemo, ho seamless kapa welded? Histori, pipe e 'nile ea sebelisoa bakeng sa merero e mengata. Li-tubing li sebelisoa mefuteng e fapaneng ea lits'ebetso tse kang kaho, tlhahiso, joalo-joalo Ha u etsa khetho ea hau, nahana hore na phala e cheselitsoe kapa ha e na seam. Li-tubes tse cheselitsoeng li entsoe ka welding tse peli ...
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