Cov kev ceev faj
1. Ua ntej siv, koj yuav tsum ua tib zoo xyuas seb lub cev tseem ceeb thiab qhov chaw ntawm cov ntaiv insulated puas muaj kev puas tsuaj los yog tawg, seb cov kev sib txuas puas ruaj khov, seb ntau yam khoom siv puas yog xoob, thiab lwm yam, los tiv thaiv kev sib tsoo.
2. Ua raws li cov txheej txheem kev nyab xeeb, tsis txhob muaj kev pheej hmoo, thiab ua kom muaj kev nyab xeeb ntawm tus kheej.
3. Nws yuav tsum tau muab cia rau hauv qhov chaw qhuav thiab qhov cua kom tsis txhob ya raws, kev puas tsuaj thiab cuam tshuam rau qib rwb thaiv tsev.
4. Nws cov kev ua haujlwm tsis zoo yuav tsum raug kuaj txhua xyoo kom muaj kev nyab xeeb thiab kev ntseeg siab ntawm cov khoom ua tau zoo.
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