Pipa LSAW (Longitudinal Submerged Arc-Welding Pipe), uga disebut pipa SAWL. Iku njupuk piring baja minangka bahan mentahan, jamur iku dening mesin ngecor, banjur nindakake pindho sisi submerged busur welding. Liwat proses iki, pipa baja LSAW bakal entuk daktilitas, ketangguhan las, keseragaman, ...
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