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| 梯级式船闸; 多级船闸 | |||
| 梯级式船闸; 连厢船闸 | |||
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| 阶梯式船闸; 多级船闸; 船闸梯级; 梯级式船闸 | |||
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| 梯级式船闸; 多级船闸 | |||
| lock flight: 26 phrases in 6 subjects |
| Aviation | 1 |
| Electronics | 1 |
| Hydroelectric power stations | 2 |
| Technology | 18 |
| Transport | 1 |
| Water resources | 3 |
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