TUSI FA'AVAE O LE TAGATA Tusipasi o fa'ailoga fa'apitoa Igoa o le polokalame Zhitong atamai masini masini emulsifier pulea polokalama polokalama Software Igoa Zhitong faʻatumu masini faʻatonutonu polokalame Igoa polokalame Zhitong Water treatment intelligent control system Le tusi pasi pateni