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| 螺旋式闸门启门机 | |||
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| 螺旋式闸门升降机; 螺旋式闸门启闭机 | |||
| screw gate-lifting device: 7 phrases in 4 subjects |
| Electronics | 1 |
| Hydraulics | 3 |
| Hydroelectric power stations | 2 |
| Technology | 1 |
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