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| долото для ухода в сторону от основного ствола (MichaelBurov) | |||
| долото без зубьев (для бурения в мягких породах); пикообразное долото; плоское долото | |||
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spud bit : 2 phrases in 2 subjects |
| Oil and gas technology | 1 |
| Oilfields | 1 |
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