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| 预留砖孔或混凝土块孔 (作接头用) | |||
| 预留砖孔; 混凝土块孔 | |||
| 预留砖石孔; 预留混凝土孔; 砌块预留孔 | |||
| block joint: 21 phrases in 5 subjects |
| Explosives and Explosive Ordnance Disposal | 3 |
| General | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Technology | 14 |
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