Tsis tas li ntawd, nws yog ib qho tseem ceeb rau calibrate GVDA GD156 methane gas detector tsis tu ncua los xyuas kom meej nws qhov tseeb. Calibration yuav ua tau los ntawm ib tug kws tshaj lij los yog siv cov calibration gas sib tov. Nws tseem yog ib qho tseem ceeb kom tsis tu ncua xyuas lub roj teeb raws li txoj cai thiab hloov cov roj teeb raws li qhov xav tau los xyuas kom meej tias lub tshuab ntes ua haujlwm zoo. Ua raws li cov lus qhia no yuav pab ua kom lub GVDA GD156 methane gas detector txhim khu kev qha thiab muaj tseeb hauv kev tshawb xyuas cov roj hluav taws xob.
Siab, nruab nrab, thiab qis rhiab heev yog haum rau cov xwm txheej sib txawv. Teem lub siab rhiab heev kom pom cov pa me me. Teem tsawg rhiab heev kom pom cov pa tawg loj dua. Tso cai rau cov neeg siv lub peev xwm kom sai thiab yooj yim ntes cov pa xau.
