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| сальник винтового типа | |||
| винтовой механический пакер | |||
| пакер винтового типа | |||
| screw packer: 10 phrases in 4 subjects |
| Oil / petroleum | 1 |
| Oil and gas technology | 5 |
| Oilfields | 2 |
| Technology | 2 |
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