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| plain hinge; single hinge | |||
| 单铰: 47 phrases in 9 subjects |
| Automobiles | 4 |
| Aviation | 1 |
| Bridge construction | 1 |
| General | 1 |
| Hydroelectric power stations | 2 |
| Ichthyology | 1 |
| Oil / petroleum | 2 |
| Shipbuilding | 1 |
| Technology | 34 |
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