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| 旋转门 | |||
| 回旋式栅门; 锁气器式挡板; 双向摇摆大门; 摆动挡板; 枢转式栏路栅; 枢转式栅门 | |||
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swing gate : 6 phrases in 3 subjects |
| Electronics | 3 |
| Hydroelectric power stations | 2 |
| Technology | 1 |
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