1. Kev txuag hluav taws xob: Cov khoom siv hluav taws xob hloov hluav taws xob hloov siab - qhov kub thiab txias mus rau qis - cov khoom kub thiab txias cov khoom cua sov, yog li txuag lub zog.
2. Kev Tswjhwm Siab: Cov khoom siv hluav taws xob tuaj yeem hloov kho qhov chaw hloov hluav taws xob thiab cov dej nrawm raws li qhov sib txawv ntawm kev ua haujlwm thiab kev xav tau.
3. Qhov Chaw Txuag: Lub compact tsim ntawm cov khoom siv hluav taws xob tso cai rau kev ua tiav ntawm kev sib pauv cua sov loj hauv qhov chaw txwv.
4. Txhim kho txheej txheem Efficiency: Siv cov khoom siv hluav taws xob
