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41. | radially open set |
| 径向开集 |
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42. | open loop system |
| 开圈系统 |
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43. | open ordered set |
| 开有序集 |
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44. | open chain compound |
| 开链化合物 |
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45. | open-bed chromatography |
| 开床色谱法 |
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46. | regular open subset |
| 正则开子集 |
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47. | open-channel meter |
| 开渠流量计 |
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48. | open center valve |
| 开中心阀 |
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49. | open-flux structure |
| 开磁路结构 |
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50. | open connected set |
| 开连通集 |
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