Cov qhov rooj hluav taws ua lub luag haujlwm tseem ceeb hauv chav ua noj. Txoj kev hla thiab nkag yuav tsum tau ceev kom tsis txhob thaiv. Lub qhov rooj hluav taws hauv chav ua noj yuav tsum tau nruab nrog Chav Kawm A / B, uas yuav tsum yog ib sab dai qhov rooj qhib rau ntawm kev khiav tawm, nrog rau qee qhov hluav taws kub ua haujlwm, thiab qhov hluav taws kub thiab rwb thaiv tsev yuav tsum ua tau raws li qhov yuav tsum tau ua nyob rau hauv ib lub sijhawm. .