有害气体

• In large cities people breathe in dangerous gases from cars and chimneys
  在城市，人们吸进汽车、烟囱排放出来的有害气体。
• Assessment of poisonous and harmful gas pollution in mining site of chengchao iron mine
  程潮铁矿采矿作业场所有毒有害气体污染评价
• Low - nitrogen combustion technology , smokeless and odorless , without harmful gas
  无二次污染低氮燃烧技术，无烟，无臭，无有害气体。
• Numerical prediction and transportation study of poisonous gas transport on complex terrain
  复杂地形下有害气体泄漏的模拟预测与输运规律
• There should be no hazardous gas , steam and conductive explosive dust exist at installa - tion site
  6 .安装运行地区应无有害气体蒸汽导电性或爆炸性尘埃。
• 3 . there should be no hazardous gas , steam and conductive explosive dust exist at installation site
  3 .安装场所应无有害气体及蒸汽，应无导电性或爆炸性尘埃。
• Mounting ambicnt : no harmless gas and steamed gas . no inductive and explosive dust , no violent vibration
  安装场所：无有害气体和蒸气，无导电性或爆炸性尘埃，无剧烈振动。
• Dampproof , dustproof and defending greasy dirt and harmful gas , sealing strong , acidproof alkali antidetonation
  防潮、防尘、防油污及有害气体，密封性强、耐酸碱抗震。
• Sending anion and infrared ray persistently , removing indoor harmful air and being goog for buman bealth
  持久发射负离子、释放远红外线，去除室内有害气体，有益人体健康。
• At ground level ozone is a dangerous pollutant , but at altitude it blocks the passage of harmful ultraviolet light
  臭氧在地表是一种有害气体，但在高空它阻挡有害的紫外光。