Fa'apipi'i mana'oga:
1. Data tifaga
2. Wtete'e taliga, tete'e masi, tete'e corrosion, oxidation tetee ma isi ata tifaga faatinoga
3. Anti tamatamai lima, susu ma anti-fa'aleaga ata
Taua o Polokalama Zhenhua:
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Tuuina atu meafaigaluega faʻapipiʻi tutusa ma lagolago faʻapitoa faʻapitoa mo tagata gaosi oloa ma tagata faʻatau.
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Tuuina atu meafaigaluega faʻapipiʻi tutusa ma lagolago faʻapitoa faʻapitoa mo tagata gaosi oloa ma tagata faʻatau.