Yog tias koj tab tom nrhiav rau cov ntsia hlau uas yuav ua rau koj cov phiaj xwm kev tsim kho sai dua thiab ua haujlwm tau zoo, hex taub hau self-drilling screws yog koj cov lus teb. Cov ntsia hlau no tuaj yeem siv ncaj qha rau ntawm cov khoom siv, drilling, tapping, thiab xauv nws nyob rau hauv qhov chaw yam tsis tas yuav tsum tau pre-drillin ...
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