| 1. | The treatment sequence involved addition of ferrous sulfate for precipitation, and subsequence filtration .
处理步骤是先加硫酸亚铁使之沉淀，然后过滤。 |
| 2. | It is noteworthy that best copper removal occurred at ph 6. 0, with the addition of ferrous sulfate only .
显然，除铜率最高是在PH值6只加入硫酸亚铁之时。 |
| 3. | Ferrous sulfate inks can only be brought out with heat
隐形药水只有加热后才能蒸发出来 |
| 4. | Determination of vanadium content - ammonium ferrous sulfate titration method
硫酸亚铁铵滴定法测定钒量 |
| 5. | The ferrous sulfate volumetric method for the determination of vanadium content
硫酸亚铁容量法测定钒量 |
| 6. | Water treatment - ferrous sulfate
水处理.硫酸铁 |
| 7. | The preparation of ferrous sulfate from pyrite cinder by reduction roasting method
用熟化法从硫铁矿烧渣中提取铁 |
| 8. | The ammonium ferrous sulfate volumetric method for the determination of chromium content
硫酸亚铁铵容量法测定铬量 |
| 9. | Ferrous sulfate injection pump
硫酸亚铁喷射泵 |
| 10. | The ammonium ferrous sulfate titration method for the determination of vanadium content
硫酸亚铁铵滴定法测定钒含量 |
