(LSAW - Longitudinal Submerged Arc Welding), e ne e tšoana le ho tjheseletsa ka letsoho (LSAW - Longitudinal Submerged Arc welding), e neng e tšoana le ho tjheseletsa ka letsoho ha LSAW-Longitudinal Submerged Arc welding. Sebaka ke hore se na le masala a hlobo, empa slag hase electrode e koahetsoeng. E khethehile ka ho qhibiliha ha metsi. Mokhoa ona oa ho roala o na le funele e cheselitsoeng ka phala ho ea ka pele ho phallo.

Tse hlano terata qoelisoa arc tjheseletsa terata bophara lokela ho a khetha ho ea ka tjheseletsa hona joale, ha hona joale 5 lithapo ka bophara tšoanang terata ho ikamahanya le mefuta e fapaneng ya hona joale, o ka sebelisa e tšoanang terata bophara motsoako. Tse hlano terata submered arc tjheseletsa hona joale le arc gagamalo di-setting, o ka tobetsa 1 silika phahameng hona joale, gagamalo butle-butle phetoho ho terata tse hlano tse nyenyane hona joale le voltage. Ho fokotseha ha hona joale ka kakaretso ea 10% ho ea ho 30% ea mohala o fokotsehile butle-butle, arc ka 1 ~ 3 V voltage e eketseha butle-butle.