نبذة عن الدورة التدريبية
دورة معتمدة اون لاين مجانية Submerged arc welding
Submerged arc welding is a common arc welding process. The first SAW patent was taken out in 1935. The process requires a continuously fed consumable solid or tubular electrode. السلامة واللحام ـ safety and welding
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