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51. | ammonia precipitation |
| 氨沉淀 |
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52. | precipitation separation |
| 沉淀分离法 |
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53. | visibility of precipitates |
| 沉淀可见度 |
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54. | secondary sedimentation |
| 二次沉淀 |
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55. | settlement basin |
| 沉淀塘 |
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56. | settling velocity |
| 沉淀速度 |
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57. | settling banker |
| 沉淀仓 |
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58. | sedimentation rate |
| 沉淀率 |
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59. | settling quality |
| 沉淀度 |
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60. | thermal precipitatio |
| 加热沉淀 |
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