(LSAW - Longitudinal Submerged Arc Welding), he rite tonu ki te mahi a-ringa (LSAW - Longitudinal Submerged Arc welding), he rite tonu ki te mahi a-ringa o te LSAW-Longitudinal Submerged Arc welding. Ko te waahi kei te taha o te toenga o te pokepokea ai, engari ko te parae ehara i te hiko kua pania. He mea motuhake ki te rere rewanga. Kei roto i tenei punaha whakakikorua he korokoro kua whiria ma te paipa ki mua o te rere.

E rima-waea ruuma arc fehokotaki'anga diameter waea kia tīpakohia rite ki te nāianei fehokotaki'anga, ka te o nāianei 5 waea i roto i te diameter waea taua ki te urutau ki te awhe o nāianei, ka taea e koe te whakamahi i te huinga diameter waea taua. E rima waea ruku pewa fehokotaki'anga o nāianei me te ngaohiko arc tautuhinga, ka taea e koe te pēhi 1 hiraka teitei nāianei, te ngaohiko āta whakawhiti ki te rima waea iti nāianei, me te ngaohiko. I roto i te heke whānui o nāianei o 10% ki te 30% o te raina āta heke, te pewa i roto i te 1 ~ 3 V whiwhi ngaohiko āta nui haere.