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| конусное соединение (в буровом инструменте); соединение заподлицо | |||
| замок диаметра, одинакового с диаметром труб | |||
| flush coupling: 7 phrases in 4 subjects |
| Drilling | 1 |
| Mining | 2 |
| Oil / petroleum | 2 |
| Oil and gas | 2 |
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