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| 基本单位; 基本环节; 元件; 单元环节; 基本网 | |||
| ［高分子］结构单元 | |||
| 基本元件基本网络; 数据组 | |||
| 元件同标准件; 基本网络 | |||
| элементарное звено: 2 phrases in 1 subject |
| Oil processing plants | 2 |
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