| 1. | Water quality - determination of the chemical oxygen demand
水质.化学需氧量的测定 |
| 2. | Cod water quality - determination of chemical oxygen demand
水质.化学需氧量的测定 |
| 3. | Photo of chemical oxygen demand in the kai tak nullah
启德明渠kn4的化学需氧量图片 |
| 4. | Cod verification regulation of chemical oxygen demand meters
化学需氧量 |
| 5. | Complete set up for chemical oxygen demand determinations in seawater
海水化学耗氧量测定系统 |
| 6. | Cod automatic chemical oxygen demand meter
化学氧消耗量 |
| 7. | Method improvement for determining chemical oxygen demand in drinking water
饮用水中化学耗氧量测定方法的改进 |
| 8. | Water quality - determination of the chemical oxygen demand - dichromate method
水质化学需氧量的测定重铬酸盐法 |
| 9. | Cod . leachate . determination of the chemical oxygen demand . potassium dichromate method
生活垃圾渗沥水.化学需氧量 |
| 10. | Municipal sewage . determination of chemical oxygen demand . potassium dichromate method
城市污水.化学需氧量的测定.重铬酸钾法 |
