I-DSAW(i-Double-side spiral submerged arc welded pipe) iimpawu: inkqubo yokuvelisa umbhobho odityanisiweyo ilula, isebenze kakuhle, ixabiso eliphantsi, uphuhliso olukhawulezayo. Amandla ombhobho odityanisiweyo we-spiral uphezulu ngokubanzi kunombhobho we-dsaw kwaye unokunciphisa imveliso yebillet yombhobho omkhulu wedayamitha, wena...
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