Shanghai Lianfeng Gas Co., Ltd. ose ta'uta'ua gaosi oloa, fa'atau oloa, ma falegaosimea o PSA i luga o le 'upega tafa'ilagi mea'ai fa'ato'aga fa'ato'aga eletise i Saina. O la matou fale gaosi eletise ua mamanuina e maua ai le mama maualuga o le nitrogen i luga o le upega tafaʻilagi, faʻafetaui tulaga manaʻomia mo meaʻai mo kasa nitrogen i meaʻai eseese afifiina ma faʻagaioiga talosaga. O la matou tekonolosi PSA (Pressure Swing Adsorption) e faʻamautinoaina le maualuga ma le faʻamaoni i le gaosiga o le nitrogen, ma avea ai ma fofo lelei mo meaʻai ma meainu manaʻomia. O le nitrogen e gaosia e la tatou laau e mafai ona faʻaaogaina mo le tele o faʻaoga e aofia ai meaʻai afifiina, inerting, palanikeke, ma faʻamamāina faiga. Faatasi ai ma se tautinoga i le lelei ma le faʻafouina, Shanghai Lianfeng Gas Co., Ltd. o loʻo tuʻuina atu fofo atoatoa mo le tuʻuina atu o kasa nitrogen, faʻatulagaina e faʻafetaui ai manaʻoga faʻapitoa a tatou tagata faʻatau. O la matou fale gaosi mea'ai i luga ole laiga e ofoina atu se tau-lelei ma gafataulimaina isi auala masani tu'uina atu kasa nitrogen, fa'amautinoaina se puna fa'atuatuaina o le mama maualuga mo le gaosiga o mea'ai ma fa'agaoioiga afifiina.