Xov xwm
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Kev tsim kho thiab kev lag luam engineering tab tom muaj kev hloov pauv ua tsaug rau cov thev naus laus zis tshiab ntawm tus kheej-drilling screws. Cov ntsia hlau tshwj xeeb no yog tsim los tho lawv tus kheej qhov kev tsav tsheb thaum lawv tau tsav mus rau hauv cov khoom siv, tshem tawm qhov xav tau ntawm cov txheej txheem drilling thiab tapping.Nyeem ntxiv