Cov ntsia hlau me me yog cov khoom siv me me siv los txuas cov khoom nrog cov duab me me, tab sis lawv ua lub luag haujlwm tseem ceeb hauv kev sib txuas cov khoom tseem ceeb. Siv dav hauv cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, rooj tog zaum, cov cuab yeej siv tshuab, thiab lwm yam. Precision screws yuav tsum tau ua kom tawv. Cov r...
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