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| 航道标 (志); 航标; 航道设标 | |||
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| 航道标记 | |||
| 航道标志; 渠痕; 渠迹; 水道痕 | |||
| 航道标 (志); 航标; 航道设标 | |||
| channel marking: 8 phrases in 3 subjects |
| Bridge construction | 2 |
| Rail transport | 1 |
| Technology | 5 |
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