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| ударный клапан (желонки) | |||
| ударный клапан | |||
| сферический клапан | |||
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| сферический клапан | |||
| dart valve: 6 phrases in 5 subjects |
| Drilling | 1 |
| Karachaganak | 1 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Oil and gas | 1 |
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