Lub luag haujlwm tseem ceeb ntawm thim rov qab radar
(1) Tshaj tawm ncaj qha ntsuas qhov kev ncua deb ntawm lub nraub qaum ntawm lub tsheb thiab qhov chaw nyob ze;
(2) Thaum thim rov qab mus rau qhov kev txwv tsis pub dhau, lub suab ceeb toom tuaj yeem tuaj yeem ceeb toom tus neeg tsav tsheb kom nres;
(3) Rov ua dua lub suab ceeb toom kom nco qab cov neeg taug kev.