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| 事故闸门; 检修闸门 | |||
| 紧急排放口闸门; 应急闸门; 备用闸门; 备修船闸; 保险闸门 | |||
| 安全门 | |||
| emergency gate: 14 phrases in 3 subjects |
| Ecology | 1 |
| Hydroelectric power stations | 3 |
| Technology | 10 |
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