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1.10 xyoo ntawm kev tsom mus rau sab nraum zoov teeb pom kev zoo tsim thiab tsim teeb pom kev hauv tsev.
2. Kev lag luam suav nrog kev lag luam, tsev so, chaw ua haujlwm, chaw nyob, pej xeem lub tsev, toj roob hauv pes, chaw ua si, thiab lwm yam.
3. Muaj kev paub nplua nuj hauv kev tsim cov nyhuv tsaws tsaws.
4. Txhawm rau kom tau raws li qhov xav tau ntawm kev ua lag luam nyob rau hauv txhua txoj kev, tshwj xeeb tshaj yog muab cov kev pabcuam teeb pom kev zoo.
5. Zoo siab txais tos cov tuam txhab engineering tuaj yeem tuaj yeem tsim khoom.