1·Waste gases from factories often pollute the air.
从工厂排出来的废气经常污染空气。
2·Waste gases from cars and factories make the air dirty.
废气从汽车和工厂，使空气很脏。
3·The waste gases must be vented from the forehearth sections.
废气必须从通路段排除。
4·Batch and cullet preheating systems: using furnace waste gases.
配料和碎玻璃预热系统：采用窑炉废气热能。
5·They produce waste gases almost as harmful as the gases from factories.
它们排出的废气和工厂排出的废气几乎一样有害。
6·They treat waste gases, protect the water sources and purify waste water.
他们对待废气，保护水源，净化废水。
7·The exhausting of waste gases in iron and steel industry has been analysed.
分析了钢铁工业中废气的排放情况。
8·The cars produce waste gases almost as harmful as the gases from chemical factories.
汽车产生的废气和从化工厂排出的气体同样有害。
9·The degradation of volatile hydrocarbon waste gases by non-equilibrium plasma in normal-pressure.
常压非平衡态等离子体降解挥发性烃类污染物。
10·A kind of catalytic combustion technology for treating the HCN-containing waste gases was introduced.
介绍了一种催化燃烧法治理聚丙烯腈炭纤维生产工艺中含氰废气的工艺。