1. Ua kom tiav specifications, ntau yam ntaub ntawv;
2. Qhov siab qhov tseeb, mus txog ± 0.1mm;
3. Zoo nto zoo, zoo brightness;
4. Muaj zog corrosion kuj, siab tensile zog thiab qaug zog;
5. Cov tshuaj lom neeg ruaj khov, cov hlau ntshiab, cov ntsiab lus tsis tshua muaj;
6. Ntim zoo, tus nqi zoo;
7. Nws tuaj yeem ua tsis tau calibration.