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  • Cov cuab yeej txiav - Drilling Insert

    Cov cuab yeej txiav - Drilling

    Ntxig laum cov khoom siv rau drilling qhov loj txoj kab uas hla. Lawv feem ntau pom ntawm cov cuab yeej siv tshuab. Lawv tuaj yeem siv tau ntawm qhov nrawm dua li cov khoom siv tho khoom thiab ntawm ntau yam khoom siv. Lawv yog cov kev lag luam ntau dua vim tias koj tuaj yeem hloov cov ntxig ntxig thaum lawv hnav. Hloov qhov ntxig tuaj yeem ua tau sai heev. Lawv kuj muaj ob peb qhov chaw txiav ib qho ntxig. Khoom laum khoom
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