Gaosiga o le malulu tusi ta'e suau'u paipa e mafai ona ta'ai malulu, toso malulu, toso malulu, fa'afefiloi malulu gaosiga.Faʻaaogaina ata tusi, o se meafaigaluega faigofie, maualalo tupe teufaafaigaluega, faigofie faʻagaioiga ma tausiga ma isi.Ae o le faaletonu o le laasaga ogatotonu o le tele, fua o laupapa.O le faʻaaogaina o meafaigaluega malulu e sili atu ona lavelave, ma sili atu tupe faʻaalu, ae mafai ona faʻaitiitia le faʻagasologa o le vaeluagalemu, faʻaleleia le gaosiga, maualuga le maualuga o le oloa uʻamea, ma le saʻo saʻo, aemaise lava mo le maualuga-saʻo lelei ma sili ona manifinifi pa puipui.

Ona o tapula'a mill lola pasi i le numera ma le tau o oloa mae'a fa'amatalaga e le mafai ona tele;ta'ai malulu ma malulu toso soofaatasi faagasologa e maua ai le oloa ua mae'a, ma le lelei lelei uamea faagasologa taamilosaga taimi puupuu, faaitiitia degreasing vaeluagalemu, vevela togafitiga, vaivai, Jiao faiga saʻo, faasaoina le malosi, faʻaitiitia le taumafaina uamea, itiiti faʻamatalaga mea mata ma faapena foi.Suauu ta'e paipa e mafai ona malulu tosoina pickling acid, hydrochloric acid, fefiloi acid, hydrofluoric acid ma mea faapena.Uamea kaponi ma uamea u'amea seamless u'amea fetaui sulfuric acid, maualuga kaponi fausaga fausaga ma u'amea uʻamea seamless saʻo saʻo talafeagai i hydrochloric acid.