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| обратный створчатый клапан (Yeldar Azanbayev) | |||
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flapper type float valve : 1 phrase in 1 subject |
| Oil and gas technology | 1 |
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| |||
| обратный створчатый клапан (Yeldar Azanbayev) | |||
|
flapper type float valve : 1 phrase in 1 subject |
| Oil and gas technology | 1 |