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| неравнопроходный тройник | |||
| разнодиаметральный тройник | |||
| редукционный тройник | |||
| переходный тройник под трубы с резьбой разного диаметра | |||
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异径三通 : 4 phrases in 3 subjects |
| General | 1 |
| Oil processing plants | 1 |
| Technology | 2 |
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