duty ratio

英 美
  • 负荷比,能率比
  • duty n.义务;职责;责任;税;关税
  • ratio n.比率;比例
    1. The ratio of isoparametric discharge pollution loading was applied to assess the environmental impact of ammonia nitrogen on the surface water bodies.
      应用污染物等标排放负荷比进行农业非点源氨氮污染环境影响评价。