Nrog rau kev xav tau zoo tshaj plaws rau lub xyoo tshiab zoo siab rau peb txhua tus neeg siv khoom! Ib qho kev yuav khoom xav tau rau TCCA, SDIC,
Calcium hypochlorite, pac, sodium chlorite, caustic dej qab zib thiab txhuas sulfate, pls hnov dawb rau
Tiv tauj peb.
