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| bailer dart; bailer valve | |||
| bailer valve (bailer dart); foot valve | |||
| клапан желонки: 15 phrases in 7 subjects |
| Geology | 2 |
| Makarov | 1 |
| Mining | 2 |
| Oil / petroleum | 5 |
| Oil and gas | 2 |
| Technology | 2 |
| Transport | 1 |
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