DSAW(Double-sided spiral submerged arc welded pipe)litšobotsi: ts'ebetso ea tlhahiso ea phala e cheselitsoeng e bonolo, e sebetsa hantle haholo, e theko e tlase, nts'etsopele e potlakileng.Matla a phala e cheselitsoeng ka spiral hangata e phahame ho feta phala ea dsaw mme e ka fokotsa tlhahiso ea billet ea phala e kholo ea bophara, u...
Bala haholoanyane