I tausaga talu ai nei, ua matua'i alualu i luma le tekinolosi viliina, ma o se tasi o fa'afouga autu o lo'o fa'aosoina lenei suiga o le PDC cutter. PDC, poʻo polycrystalline taimane compact, tipi o se ituaiga o vili meafaigaluega e faʻaaogaina se tuufaatasiga o taimane ma tungsten carbide e faʻaleleia ai le faʻatinoga ma le ...
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