2020GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances
2000GB/T 18081-2000 Health protection zone standard for crematorium
GB/T 18081-2000 Health protection zone standard for crematorium was changed to GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances.