Qhov tseem ceeb ntawm kev ua tsov ua rog thiab kev sib haum xeeb
Tsov rog System yog ua los ntawm kev sib tshuam ua haujlwm uas ua rau muaj kev ua tsov rog.
Tsov rog System yog ua los ntawm kev sib tshuam ua haujlwm uas ua rau muaj kev ua tsov rog.