Using index measurement is Vinyl Chloride 1 3-Butadiene,,,,,, Acetaldehyde Bromomethane Acrolein Dichloromethane Chloroform,,, Carbon Tetrachloride Benzene 1 2-Dichloroethane,,,,,,, Trichloroethylene 1 2-Dichloropropane 1 4-Dioxane Tetrachloroethylene,,,, 1 2-Dibromoethane 1 1,,,,,,, 2 2-Tetrachloroethane ,, 1 4-DichlorobenzeneBenzylAnd Chloride Acrylonitrile which measure every 1 month period 5 months since October 2009. 2557 to February. The 2558.
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