Mica o le lautele igoa o lapisi silicate minerale, ma le uiga o le faʻaʻesega, manino, vevela tetee, corrosion tetee, faigofie tuueseeseina ma stripping ma tumu i elasticity. E lautele faʻaaogaina i mea teuteu, uga, paʻu, ufiufi, palapala ...
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