1) Ntxiv cov hlua hlau (ib txoj xov hlau ib 0.5m)
Feem ntau ntxiv ib qho txawv ntawm xaim rau hauv 1m dav netting.
Ntxiv ob qhov txuas xov tooj tso rau hauv 1.5m qhov dav netting
Ntxiv peb cov xov hlau txhawb rau hauv 2.0m dav netting
NCO TSEG: Cov naj npawb ntawm cov hlau txuas tuaj yeem txuas ntxiv rau ntawm tus neeg yuav khoom thov.
2) ob sab ntug
Ua kom cov ntug ua ob npaug, hauv qab no yog daim duab.
3) Cov Ntsuam Nruam
Cov hlau nruam tsis tuaj yeem raug pov tseg yooj yim, ua rau muaj zog tshaj li Rov Qab Twist.
Lub sij hawm tshaj tawm: Lub Kaum Hlis-29-2020