1、废气
... emission （汽车废气的）排放 exhaust fumes 废气 sewage 污水 ...
exhaust t fumes尾气;废气
car exhaust fumes汽车尾气
the exhaust fumes废气
Exhaust fumes of vehicles车辆废气
discharge of exhaust fumes汽车废气的排放
car r exhaust fumes汽车尾气
Exhaust Fumes And废气以及
exhaust fumes from vehicles汽车尾气排放
emit exhaust fumes排放废气