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| боковой горизонтальный ствол; горизонтальный шурф | |||
| горизонтальная скважина | |||
| горизонтальный шпур | |||
| 水 平 孔: 9 phrases in 6 subjects |
| Antennas and waveguides | 1 |
| Electronics | 1 |
| General | 3 |
| Information technology | 1 |
| Oil / petroleum | 2 |
| Technology | 1 |
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