2020GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances
2012GB/T 18071.1-2012 Health protection zone for basic chemistry industry - Part 1:Caustic soda industry
GB/T 18071.1-2012 Health protection zone for basic chemistry industry - Part 1:Caustic soda industry was changed to GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances.