Nyob rau hauv qhov tsis muaj cov pa paug, natural gas feem ntau tsis ua rau muaj kev kub ntxhov.
Tseem, dej yuav tsum boil unmonitored rau ntev heev thiab overflow, extinguishing cov nplaim taws, ib qho kev tso pa tawm tuaj yeem tshwm sim. Yog hais tias cov roj accumulates mus rau ib qho tseem ceeb concentration, nws yuav tawg.
Lub sij hawm ntev ntawm cov cua sov qhuav tuaj yeem pib hluav taws, nqa ib qho kev pheej hmoo ntawm kev tawg.