Hauj lwm lawm
Kev tsis
Cov hlau siv hauv peb lub qhov rooj hlau yog dav rov ua dua tshiab thiab yog nquag los ntawm cov khoom siv tom qab cov neeg tau txais khoom xws li kev lag luam pib. Cov hlau yog cov khoom siv rov ua tshaj plaws. Ntau tshaj 50 feem pua ntawm cov hlau tau rov ua dua los ntawm cov txheej txheem hlau tsim. Kev ua dua tshiab keeb kwm ntawm kev rov ua dua tshiab, ntau qhov kev sib sau ua ke muaj rau cov khoom siv hlau siv tau.
Cim npe nrov: Cov Kev Muag Khoom Kub Hlau Qhov Rooj, Tuam Tshoj Muag Khoom Muag Khoom Kub Hlau Rooj Tuam Tshoj, Chaw Tsim Tshuaj, Chaw Tsim Tshuaj
