Aso Faʻasalalau:22,Aoku,2022 1. Sand: taulaʻi i le siakiina o le oneone o le fineness modulus, vaega gradation, palapala palapala, palapala poloka, mea susu, sundries, ma isi. E tatau ona vaʻaia le oneone mo faʻailoga e pei o le palapala ma palapala poloka mea, ma le lelei o le oneone shou...
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