Rau 3 feem pua thiab 6 feem pua cov neeg ua npuas dej, qhov sib txawv tseem ceeb nyob hauv lawv cov sijhawm siv thiab qhov sib txawv ntawm cov teebmeem. Thaum cuam tshuam nrog qhov hluav taws kub pom tseeb nrog qhov muaj zog combustion, nws raug nquahu kom siv 6 feem pua ntawm cov neeg ua npuas ncauj, vim tias nws cov concentration ntau dua tuaj yeem tswj tau qhov hluav taws kub sai dua thiab tsim cov txheej txheem tiv thaiv kom zoo tiv thaiv kev nyab xeeb ntawm ib puag ncig.
Hauv qee qhov xwm txheej me me lossis yooj yim hluav taws kub, koj tuaj yeem xaiv siv 3 feem pua ntawm cov neeg ua npuas ncauj, vim tias nws cov nqi qis dua thiab siv tau yooj yim dua. Nyob rau tib lub sijhawm, raws li qhov sib txawv ntawm tus neeg sawv cev foaming ntau, cov txheej txheem kev khiav hauj lwm thiab cov txheej txheem txhaj tshuaj kuj txawv. Thaum siv 6 feem pua ua npuas dej, nws yuav tsum tau ua kom tiav ua ntej sib xyaw ua ntej ua haujlwm, thiab siv lub siab ntau dua los ua kom tiav cov tshuaj tua hluav taws kom ua tiav cov txiaj ntsig zoo dua. Thaum siv 3 feem pua tus neeg sawv cev ua npuas ncauj, txoj kev txau yooj yim tuaj yeem siv tau, thiab kev ua haujlwm feem ntau tuaj yeem ua tiav nrog rab phom ua npuas ncauj. Nws yuav tsum raug sau tseg tias thaum siv ntau qhov sib txawv ntawm tus neeg sawv cev foaming, nws qhov ntau npaum li cas kuj yuav tsum tau hloov kho raws li kom ntseeg tau tias nws ua tiav cov txiaj ntsig ntawm cov nplaim hluav taws retardant thaum tsis txhob pov tseg thiab tsis tsim nyog poob. Nws raug pom zoo kom ua tiav kev nkag siab thiab kev cob qhia txaus ua ntej xaiv tus neeg sawv cev ua npuas ncauj thiab ua haujlwm kom ntseeg tau tias muaj kev nyab xeeb thiab siv tau.
