Dab tsi yog hom roj?
| Ob peb hom roj sib txawv tuaj yeem kuaj pom. Lawv poob rau hauv pawg hauv qab no: | |
combustible gases | |
| Cov pa roj carbon monoxide raug kuaj pom los ntawm cov roj ntes tau piav qhia hauv qhov project no. Cov no yog cov roj uas yuav hlawv. |
Cov pa phem | |
 | Toxic gases yog lom rau tib neeg. Feem ntau yog carbon monoxide thiab hydrogen sulfide. |
Cov pa | |
 | Nws yog ib qho tseem ceeb uas cov pa oxygen tsis poob qis dhau rau lub hom phiaj ua pa, tab sis nws yuav tsum tsis txhob siab dhau, vim qhov no tuaj yeem ua rau muaj kev tawg. |
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