piav qhia luv luv
Cov khoom lag luam hauv Nyij Pooj tuaj yeem muab faib ua cov khoom siv tubular thiab cov khoom tsis yog tubular (piv txwv li, qeb a thiab qeb b khoom).PSE Mark yog qhov yuav tsum tau ua rau cov khoom tswj hwm, thiab s-kos yog xaiv tau rau cov khoom tsis raug cai.
