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排放许可证 páifàng xǔkězhèng
ecol. emission certification; emissions permits; licence to discharge; permit to discharge
met. discharge permit
排放许可证【核】 páifàng xǔkězhèng
el. release permit
排放许可证: 10 phrases in 4 subjects
Ecology2
Metallurgy2
Technology5
Water resources1