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| кольцевая мелкоалмазная буровая коронка | |||
| буровая коронка | |||
| коронка для колонкового бурения; кольцевая мелкоалмазная буровая коровка | |||
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couronne de carottage : 5 phrases in 2 subjects |
| Oil and gas technology | 4 |
| Technology | 1 |
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