2020GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances
1989GB/T 11657-1989 Health protection zone standardfor copper smeltery (closed blast furnace type)
GB/T 11657-1989 Health protection zone standardfor copper smeltery (closed blast furnace type) was changed to GB/T 39499-2020 Technical guideline for derivation of health protection zone about fugitive emission of atmospheric harmful substances.