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| 枪机框 | |||
| 螺栓支撑; 锚杆支护; 杆柱 | |||
| bolt support: 14 phrases in 6 subjects |
| Bridge construction | 1 |
| Electric machinery | 3 |
| Engineering geology | 2 |
| Hydroelectric power stations | 1 |
| Rail transport | 1 |
| Technology | 6 |
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