Drill Bit

Laum khoom yog cov cuab yeej siv dav hauv kev tsim kho, tsim khoom, thiab kho, thiab lawv cov qauv tsim thiab cov khoom sib txawv raws li lawv siv.Lub luag haujlwm ntawm lub laum me ntsis yog tho qhov rau hauv ntau yam ntaub ntawv nyuaj xws li ntoo, hlau, pob zeb, thiab pob zeb.

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