1.Peb yuav ua kom zoo dua ntawm peb cov khoom thiab txo tus nqi, los lav cov neeg siv khoom tus nqi txo 40% ~ 60%.
2. Kev ntseeg siab ntawm tus neeg muag khoom.Kev xa khoom sai.Kev txhawb nqa pub dawb, peb muaj kev paub txog engineers uas ua haujlwm hauv kev lag luam no rau ntau tshaj 18 xyoo.
3.Kev pab cuam tom qab muag kom paub meej: Yog tias muaj teeb meem tshwm sim thaum siv peb cov khoom, thiab kev txhawb nqa tsis tuaj yeem daws tau, thov qhia rau peb, thiab peb yuav tawm tswv yim rau koj hauv 24 teev.