Tus Ntaus Ntawv Tiv Thaiv Cov Tua Hluav Taws Xwb yog ua los ntawm "Numbers" thiab "Letters". "Numbers" txhais tias qhov loj me me, Cov "Ntawv" txhais tau hais tias hom hluav taws.
Raws li Cov Txheej Txheem Kev Nkag Tebchaws, hom hluav taws yog A, B, C, D, E, F. Thov kos cov lus qhia nram qab no:
| Cov Tshuaj Tua Hluav Taws | Nqe lus piav txog hluav taws | Chav Kawm Hluav Taws | Cov Hluav Taws Kub Tua Hluav Taws Xob | |
| Combustible cov ntaub ntawv | Xws li cov ntoo, cov ntaub ntawv, khoob, ntaub, tsis kam | A | Qhuav hmoov, Ua npuas dej, ntub dej tshuaj, dej tua hluav taws |  |
| Cov kua kub taub hau | Xws li Roj, kerosene, methanol, ether, acetone | B | Npuas dej, Co2, cov tua hluav taws qhuav qhuav |  |
| Flammable gas | Xws li Roj, roj av roj av, roj | C | Cov tshuaj tua hluavtaws qhuav |  |
| Flammable co | Xws li cov kua qaub (Potassium), sodium | D | Cov tshuaj tua hluavtaws qhuav |  |
| Hluav taws xob hluav taws kub | Xws li hluav taws xob apparatus | E | Co2, Cov tua hluav taws qhuav qhuav, |  |
| Ua cov roj thiab cov rog | Xws li chav ua noj | F (hoob K) | Cov twj tua hluav taws hau ntub |  |