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1.10 xyoo ntawm kev tsom mus rau sab nraum zoov teeb pom kev zoo thiab tsim teeb pom kev zoo sab 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 nplua nuj nyob rau hauv kev tsim cov nyhuv tsaws kev tswj.

4. Txhawm rau ua kom tau raws li qhov xav tau sib txawv 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 kho cov khoom siv.