Sandblasting o le faagasologa atoa o le aveesea ma pasivating luga o se substrate e faaaoga ai le tafe vave oneone. O loʻo faʻaaogaina kasa faʻamalosi e avea ma malosiaga faʻamalosi e fausia ai se laʻau faʻapipiʻi maualuga e vave faʻafefe ai mea faʻapipiʻi ( oneone apamemea, oneone quartz, oneone uʻamea auro, oneone uʻamea, Hainan Prov...
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