Cov neeg siv khoom Lavxias tau xaj nrog 500pcs GVDA GD450M Digital Protractor Inclinometer 360 degree High Precision Goniometer Electronic Level Box Angle Finder Magnet Tilt Measuring Tool. thiab cov khoom xa tuaj tau xa tawm mus rau cov neeg siv khoom tus neeg sawv cev lawm. Ua tsaug rau cov neeg siv khoom txhawb nqa thiab ntseeg.
Cov qib digital no yog cov cuab yeej ua tau zoo heev uas tsim los rau kev ceev, kev ua haujlwm yooj yim, siab raug qib npuas vial nyob rau sab saum toj, rau qib ua haujlwm yam tsis muaj roj teeb, V-groove ntawm lub hauv paus ntsuas, kom yooj yim txuas rau cov kav dej, Groove ntawm 2 sab vaj tse, kom yooj yim ua cov cim ua haujlwm
