Precision aluminium raj yog ib hom txhuas raj.Raws li txoj kev ua, lub precision txhuas raj muab faib ua: txias-draw thiab nplua-draw.Precision aluminium raj, dov aluminium raj, welded raj.Ntawm lawv, qhov txias-draw aluminium raj muaj qhov siab tshaj plaws, qhov zoo tshaj plaws ntawm qhov chaw zoo, thiab cov khoom siv zoo tshaj plaws.
