Cov txheej txheem ua haujlwm ntawm cov kav dej rhaub

Thaum lub sijhawm ua haujlwm, cov khoom siv hluav taws xob thiab cov khoom tawg yuav tsum tsis txhob muab tso rau ze ntawm lub tshuab hluav taws xob, thiab yuav tsum tau tswj xyuas qhov kev ncua deb. Lub tshuab rhaub hluav taws xob yuav tsum tau muab tso rau ntawm lub hauv paus ntawm cov khoom siv uas tsis yog-combustible uas tsis ua cua sov. Yuav tsum tau ua kom tau raws li qhov yuav tsum tau muaj peev xwm ntawm cov cua sov hluav taws xob kom muaj kev nyab xeeb txiav tawm ntawm cov cua sov xaim. Nyob rau hauv txhua rooj plaub, muaj hluav taws xob cua sov yuav tsum tau nruab nrog cais circuits.