Tus kws lij choj hais rau qhov kev rau txim ntawm kev coj noj coj ua ntawm La Coal thiab liam tias "kev sib tsoo tuaj yeem thiab yuav tsum zam"
Qhov kev huam yuaj "yuav tsum tau zam" thiab kev cuam tshuam loj heev ntawm firedamp "tsis yog qhov khoom ntawm ib qho kev tshwm sim ...